I ordered a VFD to run the 3 phase motor. You can use the pressure switch to tell the VFD to start and stop.
The pressure switch only breaks a ground so I can use the cheap pressure switch I already bought. I will use the pressure gauge I already bought for this compressor.
I also ordered two new diaphragms for the unloaders. They wear out over time so they will need to be replaced.
I ordered a new gauge for the oil pump.
That is all I getting until I test it out.