50mL Luer lock aspiration assist

This is a device to help with medical procedures which require high aspiration force for long periods of time, such as abscess or endometrioma aspiration by needle. These procedures tend to last in the two digits of minutes which wears down the assistant fingers. Some automatic aspiration devices do not develop enough force or are not available. This fits a standard luer lock 50mL syringe, readily available.

The parts are printed with PETG, and have shown to survive not only the procedure but also enzymatic/cold disinfection multiple times.
I printed these on a Prusa MK4S, Prusament PETG, 0,20mm structural settings with supports on baseplate only

After cleaning out supports, assemble in this order:
Insert syringe on part 1, fitting the grooves
Insert part 2 from the plunger side, aligning the grooves and pins and locking the assembly in place
Pull the plunger out almost all the way, insert part 3 on the holes aligned with parts 1 and 2, just slightly. and then wiggle the plunger end into the recess of part 3, securing it. Please note the groove to fit and secure the plunger on part 3.
Insert the holder with the plunger (they move together now).
Thread the round nut clockwise to pull the plunger forcefully. When no turning force is applied, it will hold. Rotate the nut anti clockwise to disassemble