I am looking for a tighter slip yoke bushing or possibly a exact size bearing. I have a Doug nash it hat uses a standard 727 yoke and bushing. I had a bad vibration and the bushing walked out. Replaced it was tight pushing in but loose on the yoke. I thought the yoke might be to worn so bought a replacement and still feels loose. The tail shaft bearing is tight drive shaft has a good balance. It is going trough the traps at alot of rpm shaft is spinning over 11,000.