Fidget Piston Engine Toy

Note that the connecting rod has 2 different hole sizes, the small one goes to the piston!

if your first few layers aren't perfect you might have to trim the holes a bit.

I recommend attaching the rod to the piston first and then assembling the rest

Print settings I used:

Layer height: 0.4 mm
Line width: 0.6 mm
Gyroid infill: 15%