A great outcome, Jim, and if you count a spare belt as a capital asset, it didn't cost any expense money at all.
That top rear position would have been a terrible place for a spring-loaded tensioning pulley, because it takes a lot of load: the spring would be handling double the belt tension, so it would need a massive spring that might be dangerous to handle. For practical design it has to be fixed, not sprung. You could use it as the adjustable pulley, but not as an automatic tensioner. My growing faith in Greenfield's design work is undamaged after all.
Please feel free to start another thread if you have any problems or notice something interesting about your machine, Jim. I'll close this one.
