I've purchased two from him. I liked mine so much I got a backup in case he stopped selling them.
I've had an email go unanswered then wrote again to have him repond. I think they sometimes get lost in his spam filter.
I've gone down the road you have. For the money I think the Wolfgang is it. But you can also make your own from a RC motor. See the other threads here.
After that you get up into very expensive spindles which all seem to require 220 volt.
Personnally, for milling circuit boards, I recommend the Wolfgang.