Modular Controller is an addon for Modular Machinery. It makes each machine has its own controller. The previous controller will be useless, the only usage is for Construct Selection Tool.
Requires MixinBooter.
MM 1.10 user: install 1.1.x version. Version 1.2.0 doesn't support MM 1.10.
If you install Resource Loader, the mod also auto-generates default models for new controllers.