I just recently bought a 4 by 8 CNC with 2 milling heads. I am in the process of changing my breakout board. Got all working on xyz but I'm now stuck on the VFD. I have no manuals for the unit or the VFD. I cant seem to find anything on my VFD except "BEST" on it. I have a picture of it as it looks like an older unit. It might be an fc 300 but not sure. Was looking for help identify my vfd and also help programming it.