Thanks Jim, I'm way down south south right know and that's good to know about the S version. What's the general consensus on the 91S in a Viojet versus OS in either the Viojet, Dynamax or Ramtec? I know I'd be somewhat limited on applications with the BVM fan, but I also have a motor mount to put a BVM 91 in a Ramtec. Will this engine work in a Ramtec fan? I've been told it wouldn't be a good match for a 91R but what about the S.