interesting, only just stumbled across this thread. I too have an Omnimill. I ended up buying a small 3 phase motor for the feed as I couldn't fish out the star connection inside? I use 2 x Powerflex VFDs, one for the vertical spindle and one for the new feed motor. Im thinking of using the selector switch in the base to try and wire in the horizontal motor? This thread has reminded me to stick it on the project list......................For the coolant, I just used a 240v pond pump, works great, but I hardly use it to be honest.