For the past year, there has been a group of people studying AC propulsion systems. They all eventually noticed the huge gap in the AC motor offerings.
The present AC50 and soon to be AC75 are the top of the "lower" cost systems out there for DIY people.
Among this study group, are engineers, scientist types and some talented machinist /fabricators, as well as people like me (I'm more like a swiss army knife).
They have decided to work out the methodology and materials required to do a DIY motor customization. Their findings, so far, are really simple and cheap. We include controller optimization programming also.

We have started a new forum dedicated to sharing this information to the DIY crowd. www.ivanbennett.com/forum/

So, anyone really interested in making their own AC propulsion motor is encouraged to view, ask questions and contribute to the discussion.
The forum is only 2 days old at this date, so please be patient, contribute and help us grow.
TYVM, Miz