I might not be an auto mechanic, but I'm pretty sure IC engines don't work like that with open pistons.
Thats true but I think it looks cool
I don't know how others feel about the art,
A lot of people. like it, and many are just happy to see fully custom assets instead of repainted vanilla ones. Everything custom adds variety when you play with multiple mods.
I wouldn't want people to quietly just abandon a thing I made and for me to somehow never find out why
I think it's fine. I mostly make stuff because I want it in the game, not so everyone likes it.
The assembling machine was one of my first 3D animations, so it might require some work, but for now I think it's fine for what it is.