Mitchell and I added 200lbs to the HAM now holding 800 lbs. The 50lbs in the middle is sitting on the 600lb leg element on four 1/16" thick viton pads. The three other 50s are on the ISI Optical Table but we couldn't get them to be non-rocking, two imperfect planes... So we turned the masses over and set them on just three pads.
Next step, unlocking, torquing, cabling, TFs.