To answer my own question about which mill this is; When browsing the cnczone members homepages I found
HomeCNC's homepage:
www.homecnc.info which is the exact same mill, hurray! Lot's of good info on converting the mill.
Chich2: Looking forward to your thread. Can you tell me more about the wheelchair motors you found? Did you use the E5S series usdigital encoders?