No, not that kind of pot. The kind you grow things IN! This hydroponics pot has a grid at the bottom to hold growing medium (perlite, vermiculite,pummice, clay beads etc.) in. If the plant's roots take control of the pot, these ones are made of Diamond Age Solutions' Ivory PLA so the whole lot can go in the compost bin when the growing season is over!

This seals the end of a piece of "100mmx50mm" (which is a metric approximation) rectangular downpipe, closing the ends for a hydroponic run. It is parametric and can be rescaled to suit larger pipes, or indeed anything with a rounded rectangle profile that needs plugging!

This replaces the two-part upper Z bar clamps on a Mendel and has vertical holes in it for you to attach supports for a spool holder. I just use a couple of Darwin corner brackets to hold the crossbar.

This adapter slides on to an airgun "10mm" dovetail as found on my Cannon 737 (Sharp Innova). The rail is slightly split so that the clamping action of the scope closes the adapter up on the 10mm dovetail.

Not sure how much abuse it'll stand up to on a spring airgun but seems OK for pneumatics.

This prints as a set of two parts: A well shaped a bit like a volcano with a filling crater at the top, little tunnels to let ants into the crater, and a lid with a centring stem to keep the rain out. The aim was to have something stable I can put ant poison out in without worrying about what our stupid cats will do.

The shape I settled on is a broad, flat cone for stability and to lower aerodynamic drag - it's vaguely reminiscent of the tornado ground cameras. The central well is a 45 degree cone to discourage sloshing and to make it more likely that your RepRap will produce a watertight object!

Darwin RepRaps are pretty old-school now, but together with thingiverse.com/thing:921 these corner blocks work pretty well with M8 studding for building frameworks.

This is my fixed up and rounded off version, that uses less plastic etc.

There is an option in the SCAD file to combine two extruders in one unit.

This is a complete X carriage, belt clamps, 608 bearing extruder, PLA linear bearings and all in a single, solid chunk that can be printed out with no support material. This is part of the project to remove Mendel's nuts thingiverse.com/thing:9005 .

Our kitchen working surface gets covered in washing up liquid every time our washing up brush gets left or knocked around. So I created a holder in the vain hope that people will stand it up and our kitchen will be just that little bit tidier.

Even if you don;t lean the head over the feet it's still pretty stable.

I even remembered to include drainage holes, but do squish the water out of the sponge before storing or it'll dribble all over the windowsill.

This is not completely hashed out, and is slightly smaller than a standard Mendel. But it should allow a frame to be constructed from these vertex modules. I've made special vertices for the top of the frame for the X motor and idler as the carriage thingiverse.com/thing:9385 can now slide along the top bars.

The Y axis components (still being worked on but in the SCAD file) slide on the lower two bars, so mechanical requirements are simple. The sockets are parametric and will work with screws, bolts, glue or - my personal favourite - tape and a mallet.

With a bit of luck, the ARNIE string Z axis revival will allow a RepRap to be made without any threaded or steel rod in it at all.

This is harking back to the old direct drive pinch extruder in an attempt to reduce bulk and complexity. Two extruders like this can fit on a single X carriage like thingiverse.com/thing:8822 . The stepper does not need to be machined.

It uses a single 608 "skate" bearing as the other side of the pinch, and when two extruders face each other a .The stepper shaft is coated with rough material and epoxy (the "No Epoxy" in the title refers to the fact that the PTFE is not epoxied in place).

Requires thingiverse.com/thing:2192 if you decide to rebuild under OpenSCAD.

This is my second modified Prusa Mendel X Carriage that will fit the standard Mendel X axis. It uses PLA bushings instead of the standard bearings. These now clip in place and have pins on top that locate into generous spaces in the carriage. This allows the user to optionally bond the bushings in place by dropping glue, blu-tak, gum, earwax etc. into each hole.

This is designed not to fix to a Prusa Mendel, but to clamp to the Mendel drive belt using the 2 clamps provided in the design.

Two pinch extruders thingiverse.com/thing:8830 or one Wade extruder can be fitted to the carriage.

This is a derivative of the clamps that hold the Mendel Y axis bars. It holds a microswitch for the Y max or min sensor.

I had two things: A broken penknife on my desk, and a need to showcase the new Silver PLA at diamondage.co.nz/pla.html - preferably with something shiny. Like that knife blade. Ahah! I now have a light handle that fills my hand well and has a nice lanyard hole too.

This handle is configured to accept a 2.5mm x 25mm x79mm blade with a 6mm pivot hole. The OpenSCAD file is parametric though, so you can fiddle around to suit whatever blade you happen to have at hand or knock up in the forge.

Croc clip leads have this bad habit of going wandering. I even seem to have some that wandered in to my workshop. So I need something to give their little jaws some exercise on, and simultaneously keep them organised and close to hand.

It's much safer than letting them chomp on passing mains leads and adaptor cables.

This one is slightly flexible, so I can do things like screw it to wooden pillars. If anyone takes that out of context, I'll sue.

We have a hand-wound impeller fan bellows for the log fire in the dining room and it makes a devil of a racket when you turn the handle. My wife hates it so I made a much quieter version that runs off a couple of AA batteries. Basically it is thingiverse.com/thing:7350 with a handle and battery holder stuck on, but I've improved the parametrics a bit.

If I run it off 12V it beats my 110mm forge blower!

Here's a model of Mjöllnir, Thor's Hammer ( secure.wikimedia.org/wikipedia/en/wiki/Mj%C3%B6llnir ), scaled to the same size as an artefact found at Bredsätra in Öland, Sweden. Not quite up to the same standards of workmanship, but it'll do for a start. There is a hole for a cord in the handle, and the SCAD file is parametric so you can easily change it's size and shape without altering the size of the cord hole.

A pistol that can shoot NERF(TM) foam darts (amongst other things). Needs nothing other than some filament, 3 printed bits, 2 rubber bands and a foam dart.

It seems to generate more power than yer average foam dart gun, because I'm not bound by children's toys regulations. So, test it before using it in combat games.

It's parametric so you can change the grip size, dart dimensions and all sorts of stuff. No sights yet, and it could do with some clip on fancy grips, so hack away :)

This is a parametric design for a centrifugal fan. I wanted one that could take a knock or two to blow air into my forge with, so I designed one with parametric wall thickness, fan clearance, diameter, height, output nozzle and inlet hole diameter etc. It can be printed entirely without support material and the two halves are held together with 3xNo.8 screws.

The sample fan is 70mm in diameter and 45mm high. It uses a small 12V motor I salvaged, but can easily be modified (physically or programmatically) to suit a range of motors.

The forge now has an RP'd 110mm diameter blower, and that blows plenty of air into the tuyere. The motor I chose does not have a very high RPM. It can only just reach white heat with one fan, but does not melt even in PLA due to the high airflow. A much faster motor on a smaller printed blower produces a higher flow, so I'm sure I can get more out of it later.

If you want one with a handle on, see thingiverse.com/thing:8096

A simple target in the shape of an Easter Egg, to assist with upcoming training for the Easter Egg Hunt.

Remember: Unlike real Easter Eggs, you should only practise on these targets with plastic Airsoft BB's. Unless you just get a kick out of blowing things to smithereens.

What, I thought, is going to come in handy on St Patrick's Day? Of course, a beermat! So here's a shamrock beermat, built on the work of various CCbySA licencing artists.

This is two Wade extruders joined together. The mounting holes from the second extruder have been moved, and they're just a few mm off being joined by the centre hole. This is so that the pair can be mounted across the x-axis rather than along it without hitting the standard Mendel X drive belt.

You will need to use the collared drive gear as few motors I found had shafts long enough.

This uses mendel.conf and mendel.inc from thingiverse.com/thing:2192

I remember seeing a picture of this mushroom in a wonderful David Attenborough book. It was photoluminescent, and photographed by its own light. So in a fit of nostalgia (and possibly because I needed one for a magazine article) I created this model.

Designed to be knocked down non-destructively by 6mm airsoft guns. If you shoot them with 4.5mm (.177) BB's they will disintegrate - so use biodegradable PLA for stunts like that.

Despite what you see in the spy movies, what people call a "silencer" can't really be done in any size smaller than a beer bottle. Printed on normal 3D printers, this is a sound moderator: It won't eliminate the sound of an airgun firing, but will cut out the sharp "crack" that makes birds fly off and wives complain from the study.

It works by allowing the excess gas from the barrel to expand slowly in a series of chambers, shown in the cutaway image. If you use this with a firearm you will probably melt it.

This is a modified Prusa Mendel X Carriage that will fit the standard Mendel X axis. It uses PLA bushings instead of the standard bearings.

The main difference is that it will clamp to the Mendel drive belt using the 2 clamps provided in the design.

A secondary difference is that it will hold the double-Wade seen in the background of the photo (details coming soon).

There aren't too many places that you actually put a hook on an exterior corner of a wall, but the partition wall for my kitchen is one such. To replace the prototype (a block of wood with nails in) I drafted this item, partly done as a test for the UP! Printer.

When you want to mix up some 2-part epoxy, there are never handy things to mix it up in. Well, problem solved. Not only that, but it comes with a little spatula that's flat at one end and pointy at the other.

You can re-use these a few times, and if using PLA and "organic" epoxy, you can even burn it up at the end of its life with a relatively clear conscience.

Disclaimer: I sell PLA bioplastic filament at Diamond Age Solutions and am having an ethical dilemma over whether I should optimise this design...

Cabbage white butterflies are antisocial when they're laying their eggs. So if you stick up decoy butterflies, you can scare them off your crops. It's slightly oversize so it looks more intimidating to butterflies. Feel free to evolve the design.

Ignore butterflies attempting to mate with your decoy. They are stupid males and will not be laying eggs.

This is a plug designed to go in the upper holes of NFT and similar hydroponics runs. It is not entirely waterproof, but will help stop rain entering your system and diluting the nutrient. More importantly, it cuts out the sunlight and prevents algal scum growing in the run immediately beneath an empty hole.

Oh, and it keeps frogs out.