Does it currently work? You could certainly enjoy it as-is and not install any more of that.
Some of the parts I see in there look to be replacing parts that aren't in the signal path, so there may be some dubious ideas in here. It looks like there's a bunch of Cree rectifier diodes and a PC board to hold them, and maybe some diodes to do the ground/earth diode isolation mod stickied on the Crack forum. I'm not so sure about the rest of it...