I think the weight of the machine and the amount of material in the frame (or lack of) is fine. The idea is to have a super light machine. I dont mind the vibration, and I would rather have a super light machine and feel the vibration a bit than bulk up the machine to try to apsorb the vibrations. My comments about the vibration were just an observation, not really a complaint.
I have no problem with the motor either. It is plenty strong and mubachi is fine.

For me it is really the tube vise (which works, but could be better), and overall performance. I have not given up on this machine and intend to give it a bit more time and see if we can get along.

Glad to see Nin is back around to answer questions etc.