As promised. Tear down of the 8505A. In reality there isn't a lot to see.
Top cover removed. The individual function modules. I did not pull them and risk contact issues.
The power supply.
Rear panel.
Bottom panel removed. This thing has enough shielding to survive an EMP pulse.
Follow up plans: The cleaning and removal of stickers is done. Both top and bottom panels are going to get painted. Get rid of that faded beige.
The power supply will be re-capped. Once that's done and the verified investigate some minor issues noted on the 100VDC and 1000VDC ranges.