A short video can be found here: http://www.youtube.com/watch?v=0JeQInnJPgU---- Print out all parts.- Mount the handle with 3 x (3 x 20)mm screws and 3 nuts.   The foremost hole remains empty (yet).- Bead the "clamps" and "brackets" on the (3 x 60)mm screw   and the foremost hole.   Install washers on both sides of each "clamp" (see image).- Add 2 nuts on each side of the screw (counternut)   or use locking nuts (I used 2 red plastic gears).- Insert the (3 x 65)mm bolt through the rearmost holes of the "clamps".   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<br>   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.BOM:- 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 syringeTOOLS:- screwdriver- soldering iron (best set to 250°C) or side cutter