need input on the idea of replacing the motor on an old Ampmaster pump with a variable speed 3 phase motor and a pc compatible controller . House already has 3ph service btw. would make for a great closed loop/wave making system pump! Only problem is I can not find a 3ph motor with the correct frame size and shaft threads. I think I will get a stub shaft made just like the old 1ph motor and use shaft couplings to hook the 2 together. Anybody see this as totally wack?