The "easiest" way (no desoldering):
Unscrew all 3 pcb-related sections:
2) small psu pcb
3) large psu pcb
I had to cut the zip-tie that was holding the transformer in place. Also had to disconnect (and label) the 2 molex connectors nearest the large psu pcb. The transformer is on a metal plate that i kind of wedge into the area between the top and bottom of the chassis. I then used painters tape to fix the transformer in that space (taped to the front panel somewhat awkwardly). This provided enough give that I could angle the main psu pcb and move it in front of the back-left standoff that this pcb was attached to. I had to disconnect the molex connector at the bottom right of the cpu pcb and cut one of the strings that was keeping those cables bound together. You can do work on the psu pcb in almost all areas this way without desoldering the connections. Nothing was harmed, scratched or otherwise doing it this way. It was stable enough to desolder the caps without worrying about things shifting around.
Also, recapping the JP6 PSU made a much bigger difference than I expected. Now I just need to replace two more suspect electrolytics, replace all the sliders and 2 of the pots, recal it all and then it's back to being played.
Hope this helps someone...