My parts from Ofna came in today, and I got to re-assembling this roller. The 2-speed issue persisted, and I tore it apart, and rebuilt it as per the manual, and had the same binding issue. Either the plastic bushing (between 1st spur and bearing) is too big, or the bearings themselves are too big. Something isn't quite right... I went ahead, and ground down the plastic bushing about 3mm and she drops right in, no binding... Maybe the previous owner had the wrong size bushing in there???
Everything else went along OK. Got the Hyper .12 installed, no problems, just need to get the electronics installed this weekend, and get her broken in.
Thanks for the direction/advice everyone.