[TowerTalk] thrust bearings

[knowkode at verizon.net]

Greetings All,
I have used Rohn TB3 thrust bearings in the past without issue but I have seen my fair share of worn out  bearings due mainly to an antenna being parked in one direction for a long time- pitted races were the result. I've no experience with anything else and that brings me to my question. Is there something better out there? DXE claims an improvement over the Rohn bearing but it looks as all they did was add a lower seal. I'm leery of Yaesu if the bearings are made from the same pot metal as their rotor mast clamps. Bearing recommendations for an installation with a 2" mast  with about 8' above the bearing and 2' below and an antenna along the lines of JK's C3S antenna are sought.
Tnx es 73,JimW5QM