Follow up on this - this winter I noticed my rollers seemed much harder to ride, and the flywheel didn't seem to provide much momentum. Finally one workout the rollers started to squeal. Started checking the rollers and noticed the flywheel didn't turn very smoothly. Upon inspection I discovered I had a seized bearing, and had it been seized long enough that the shaft was worn oblong. Fearing a very expensive repair I contacted
Kreitler/MRP about replacement parts. Spencer quickly replied that the bearings were $4 each and the shaft was $6 so $14 to fix the flywheel. He setup the order and sent me a link, all I had to do was enter my credit card number and shipping address. I had the parts 3 days later, and about 1/2 hr after the parts arrived I had a quiet and smooth set of rollers with a flywheel again. HT to Spencer at MRP for some awesome customer service, and to MRP for having some incredibly inexpensive replacement parts.