OK so did the trigger mod today. Works great. Spliced in after the main switch on the amp so I can still kill the power if something ever requires I shut it down manual.
3.5mm jack and Relay and through hole board:
Removed this foam not real sure why its there..... Amp fan runs much quieter and slower with it out......
Shot of relay after switch with 12v trigger current coming in on the twisted blue white pair.
Nice finished look. The way it should have come from the factory.
The relay mod works well, I did have to adjust my trigger delay for the amp to keep away the dreaded thud when all the other gear powers up but that was a simple setting in the projector.
I'll never have to flip the amp switch again unless I want to and that is worth the time it took to disassemble the rack do the mod and put it back together.
Total cost... about $10 for the 1/8" jack, relay, and board. The rest I already had but it did take about 4hrs.....