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.