I've figured out the material slot name warning when reloading a save with the swather but I can't find the error you've listed there. Could it possibly be a mod conflict?
yeah the issue im having is i can make my wheel color changeable but visually it wont hold through a save and restart, it will still be correct in the store but on the machine its always back to default color
If you look at the newest version there is a fix for that in the hubs section on the swather that makes is connected to the base color for the frame of it.