Hi Lee,
I know there are cheaper PB bearings out there. I chose these for the compact size as well as the 50mm shaft size. There wasn't a lot of choice at the 2" shaft size. 2" is massive in real life
The bearings with bolts on the outsiude were all wider than the standard 160mm Aluminium flat bar I used, which is why I went for compact. I didn't expect the SS shafts or the qd bushes to cost as much as they did either
Cest la vie
1.5" would have been cheaper but was too close to the 1 1/8" size of the Gaunt mount.
Will have a few photos soon of the tangent arm, which is nearing completion....slowly. Lots of drilling and tapping of the clamping section going on...I'm waiting on the RA electrics from AWR Tech in the UK before deciding how to attach the worm, gear and motor. It should be shipped next week I hope.