James / Guys, sorry for the late reply. Have not had a chance to post.
Here are a few images of the marked up schematic that I used. H = Holco Copper end cap resistors
V = Vishay VSR bulk foil resistor
The other key area is the CX-1 is full of interstage coupling caps. I originally tried to eliminate them, but circuit changes were too involved, so left circuit stock and added film and foil bypasses to caps.
The Power supply upgrade is the first thing I would do
1. Fast recovery bridge rectifier
2. bypass the main PS filter caps.
In the next week or so, will try to find the images I took during the upgrade.
best
John
also forgot to mention, as long as you have the bottom cover off, look for cracked solder joints where the RCA jacks are soldered to the PCB.
See attached pics.