All the stainless steel pieces of the suspension
rocker have been welded together and pre-polished, but ofcourse
the heat from the welding has slightly warped the part. Using
some very thin pieces of aluminum sheet to protect the part
we put the rocker in the lathe and used a dial caliper to measure.
Yep, it was warped... We used a marker pen to mark the high
spot in the rocker, then put the rocker under the press (using
aluminum blocks to prevent damage) , then back in the lathe
to measure again. After repeating the process 3 times the rocker
was straight and we proceeded to drill out the aluminum-bronze
bushings about 1 mm smaller then the final size. Then we machined
it about 0.2 mm smaller then the final size and used a reamer
to complete the operation.