Also, as soon as I get the time, I'll build a tutorial on how I used a single KBAC VFD to power TWO separate grinders. Just by buying/wiring in a toggle switch, you can run two machine off one VFD..... and save about $400 in the process.
Here's a link to a webpage on my site for the modification.....at least the way I did it. http://www.caffreyknives.net/1_VFD_2_Motors.html