Building factory market place kit. What should I include?

Hi everyone

I’m presently making a market place asset for a factory machinery kit. I just thought I would raise it here to see if anyone had any recommendations of asset or functionality to include that people might like. At the moment the core is a set of conveyor belts and object that can be moved around on them like this:

Also I’m just making some robot arms at the moment a little like factorio:

I’m working on these too:

  • A crusher
  • Pipeline to drop things from ceiling / walls
  • A large smelting vat

I’ve made it so the conveyor belts can affect the character too. Any advice?

Thanks in advance