Print out all parts.
Mount the handle with 3 x (3 x 20)mm screws and 3 nuts.
Â Â The foremost hole remains empty (yet).
Bead the "clamps" and "brackets" on the (3 x 60)mm screw
Â Â and the foremost hole.
Â Â Install washers on both sides of each "clamp" (see image).
Add 2 nuts on each side of the screw (counternut)
Â Â or use locking nuts (I used 2 red plastic gears).
Insert the (3 x 65)mm bolt through the rearmost holes of the "clamps".
Â Â Let 5mm jut out on each side (for rubber band). Fix bolt with glue.
Use a soldering iron or a side cutter to cut a triangle shaped
Â Â flute into the upper part of the syringes piston (see image).
Apply some drops of oil to the rubber seal of the syringe.
Attach the front and rear "brackets" and mount the springs.
Fix the rubber band that pulls down the "clamps".
- Clip the barrel (bird perch) onto the syringe.
- 1 x 100ml bladder syringe, 40mm diameter, round handle
- 2 x 100mm tension spring or 2 strong rubber bands
- 1 x rubber band
- 1 x plastic bird perch, hollow (8-10mm diameter inside)
- 1 x 3mm bolt, length 65mm
- 1 x 3mm screw or thread rod, 60mm
- 3 x 3mm screw, 20mm
- 7 x 3mm nut
- 4 x 3mm washer
- a few drops of oil for the syringe
- soldering iron (best set to 250Â°C) or side cutter