Thanks for the suggestions folks. I’ve done some reading on the inter webs, and this spring is a known flaw/weak point in this model. unclear if there is a fundamental design issue, they are using jenky springs, or both. The company will only sell you the entire flywheel assembly for $200...hard no on that one. McMaster has a similar spring, but would be about $80 with shipping. My Dad is digging through his spare parts for a similar spring (he knows he bought a big box of springs at farm auction sometime ago for a couple dollars...the dude has everything in his shop). I’ll probably install the closest thing he can find, and go from there. That is about the $ and effort I want to put into this thing at this point.