Ive had many old school radical roller cams based on a reed cast cores that had somthing to do with Bid Daddy, this was before the billet camshafts.

By some of the specs I dont think they were very worried about major issues, could the billet solid roller just of been part of the progression of roller cams???

All these cams were match to small roller lifters I think were crane, and I did notice a slightly small roller wheel vs a std comp roller.