Fidget Engine: i2 and i4

This model was inspired (in part) by Mars3D's print-in-place Motor Fidget, I definitely recommend checking it out!

This is a semi-print-in-place fidget toy, resembling either an inline-2 or inline 4 engine (whichever you pick). It requires some assembly, but don't worry; it's easy! After printing and assembly, it may take a little while to become more smooth, but it will eventually become easy to turn and play with. My print profiles come with my built-in brims and supports for the piston-crankshaft piece, and they also have painted on brims for the engine blocks. (If your bed adhesion is pretty good you can remove the painted on engine block brims, I found that I needed them though.) If you prefer to use your own supports and brims, you can do that as well with the included .step files. Make sure to orient the parts in the .step files to match the slicer screenshot for best printing. If you want a left-handed version, the knob and end cap are reversible, and in the future I might make other attachments for this (like a drill bit adapter, a crank, etc.) Any feedback, suggestions, or support are greatly appreciated!

Assembly:

1. Remove supports and brim from crankshaft, connecting rods and engine block (if you have them there). This may require needle nose pliers or tweezers to help.

2. Slide pistons into cylinders, making sure to place the side with the cutouts to the back

3. Slide crankshaft into its resting place under the hooks

4. Slide the knob and end cap into the ends of the crankshaft (whichever ends you choose)

5. Done!