I recently purchased a nice used Bridgeport mill. Always wanted one so I'm pretty psyched. It has a 1.5 hp 3 phase 220VAC motor. I only have residential single phase in my garage. This mill also has a variable speed head, so technically I don't need variable speed capabilities. But from what I've heard, VFDs are much more efficient than static 3 phase converters, which apparently lose a lot of power in the conversion. I see on ebay there are a zillion choices for VFDs, almost all Chinese stuff. I don't want to get burned buying cheap Chinese junk. Although maybe some Chinese stuff is ok, don't really know. So I'm hoping someone can steer me in the right direction to a popular/commonly used/well respected unit. And also clarify if I should get a VFD or maybe a static converter. Not sure what I heard was accurate, so some clarity there would be appreciated as well. Thanks....