RE: OS 46/55 bearings bad again!
I must just be living on borrowed time then because I seldom use afterrun oils though usually we do run the engine dry.. and I've never had a bearing go bad ever.. knock on wood watch us lose 5 engines next weekend! We use the os engines mostly because of the overall quality and reliability and strength, of the ax engines, I think the la's are just bushings but they're too weak to use on anything but a light trainer anyway..
I can answer the thunder tiger question above, every since they been made in china the bearings don't go out because they never sustain a run long enough to heat up the bearings anyways, glad I could help.