Hey Rob :)
I have done multiple Xtreme Music LM4562 opamp upgrades with BG cap replacements and have done one livebay upgrade that somehow went sideways. I replaced the opamps on the headphone and RCA input and lost RCA functionality and I am still trying to figure out what went wrong on that one. I will get to the bottom of it tho.
I have also done opamp replacements on my Xonar D2X (center/sub, and rear surround) but was harder than I anticipated as it is difficult to remove the stock opamps as they are surrounded by caps.
My prelude is virgin as I am pretty happy with it in stock condidtion, and it will most likely see digital duty when I get my home theater in full swing when I get my new house later this year.
All-in-all I find these mods very fun to do and have great results if you use due diligence and the correct tools.
