Hi Bruce, Build is as you would expect.... a little crude with the finish of the mechanical parts. My guess is we could make improvements without too much effort, such as making it quieter, etc. Mechanically... it runs fine and likely as good or better than a fair number of the originals it was modeled from. Based on the Jost fan design.
I just burned a full pot of alcohol and it ran for over 2 hours and 15 minutes after a 5-10 minute warm up.