Now this is getting interesting! ALMOST tempted to pull one apart and have a look. Almost... After fiddling with these cars for 40+ years, I must admit I have never looked down a tube. If things ware bad, I pulled the whole axle assembly, and took it all apart, repaired as required and reassembled. I honestly do not remember if the back side of the carrier bearing looks like that... BUT, I DO KNOW WHO DOES
! He is working on one as I write this
! PM Alfar7, Richard Jemison. He is currently building this type assembly for one of his customers. He can read this thread and either answer from memory or better, be persuaded to include photo's
! Ask him to have a shot at this one!
Gordon Raymond