Been playing the game about a week and hooked, but I do have some ideas that will make it easier/more user friendly in my opinion:

Make the import side and built sides of the manufacturing slots separate. As in the “Make Driveshaft” slot, they are next to each other and as soon as the conveyor is put in the import side will take priority and fill the “fit station” before the it can even make 1 driveshaft. I would like to be able to bring in raw materials, build the part, send it to the stockpile, and then to the fit station.

It would be really helpful if we could control what comes in the import doors if the above would take a lot to do.

Would love to see a pick up truck body type, maybe even be able to decide single cab, extended cab and quad cab.

I am sure I will come up with more, keep up the great work!

There already is something like that in game.
If you have the advanced fitting stations you can select them and choose adjust a setting to allow only in house items, or prefer in house items etc.
Currently this functionality is not implemented for stockpiles yet.