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Too many (toy) train models? An ever expanding lego train collection and storing trains in boxes just isn't enough? Use the TunnelBridge wall-to-wall bridge mount and some plywood to show your ever growing collection to friends, family and the internet of course!
Use the template to easily draw and cut out backdrops from thin black cardboard for the tunnel entrances.
All joking aside our kid is an absolute train buff. If he could afford to have a real train he'd probably buy one. The question was how and where to store those train sets, keep some accessible to him and some out of reach of his little sister. Took me almost half a year to get from printing the first version to finally installing the latest iteration but the photos can attest to what it's about. One of my most rewarding 3D printing projects so far - despite presumably low interest due to it being as niche as it can possibly be.
But in case you can use this - please enjoy!
15%, 3-5 perimeters, top and bottom layers
This prints very easily on all my printers ranging from the Ender 2 over the CR-10 up to the Prusa i3 MK2. Not a single issue with any of the prints other than running out of filament.
For the template you might want to consider a brim or higher bed temperature as mine lifted a little bit. Looks like there wasn't enough material for the bed to hold on to. The template however can be printed almost hollow with 3 or 4 perimeters, top and bottom layers.
Go rough or pretty - up to you
We decided to keep the plywood bridges the way we up-cycled them off the shipping crate. Just a few brad-nails and some left over cut-offs for structural rigidity. How you design the bridges is pretty much up to you. Make them wider or narrower,, glue them, paint them, add rails to the side or put rails on top - there aren't many constraints. Add a black piece of cloth or cardboard between wall and "tunnel entrance" to enhance the tunnel effect.
The extension where the bridge is meant to rest on is by design as wide as the distance between the lego rails. By chance this is also the width of the Märklin "M-Gleis" metal rails.
• 2018/05/19 Added a template to help cut out black backdrops for the tunnels from thin cardboard
• 2018/05/22 Added a photo of what the tunnel looks like with the black cardboard installed