Yes I have thought about VFD, and it is the obvious sensible solution to many things, I even have 3 ph on site. It just doesn't have soul, well that's the way I thought about. I would have to fit a 3 Ph motor but I don't think that would be very hard. Liang Dei even have a 2hp 3ph motor that's a bolt on fit, I could have ordered it that way, I just didn't think I'd need it. Obviously didn't think it out enough. I know it's crazy, here's me always telling people go bigger go better, and I broke my own rule. I need to find out more about VFD, will they work with any 3ph motor, how much increase and reduction in RPM can you get without damaging the motor, is there a loss of power, there must be a trade off some where?