02-04-2010, 07:46 PM
You need to figure out how to maintain good wiping contact with those two copper wipers. I felt that the mounting system with a screw and nut was unsatisfactory, and they slipped a lot, including right off the brass ring. So, I made wider spacers and drilled a suitable hole so that one could be slipped between both rings and under the bottom one, effectively creating a circular shelf upon which a slipped wiper would ride.
The pit is out of round on almost all of them.
The lowest bearing surface on which the pivot post rides is inadequately engineered. What I ended up doing was placing two fairly thick styrene rectangular shims between the large steel washer at the top of the pivot post and the nether surface of the TT's pit, snugged up against the central hole in the pit. I used styrene glue for that purpose, and lubed the showing surface to the washer. If you get the correct thickness, the washer will do a good job of stablizing the wobbly bridge above it.
Good luck. I eventually discarded the kit and purchased the built-up indexed 90'er and have not looked back. What a gem it is!
-Crandell
The pit is out of round on almost all of them.
The lowest bearing surface on which the pivot post rides is inadequately engineered. What I ended up doing was placing two fairly thick styrene rectangular shims between the large steel washer at the top of the pivot post and the nether surface of the TT's pit, snugged up against the central hole in the pit. I used styrene glue for that purpose, and lubed the showing surface to the washer. If you get the correct thickness, the washer will do a good job of stablizing the wobbly bridge above it.
Good luck. I eventually discarded the kit and purchased the built-up indexed 90'er and have not looked back. What a gem it is!
-Crandell