@vanson1 In my opinion, you could not be further from the truth in your statement thet "there is much more to be gained there". And there is certainly a lot of low hanging fruit to be had to this end especially if you have some basic mechanical skills. It's not that hard. (seems like you already may know this). All my amps have direct wired DH labs silver copper AC all the way to the fuse block. I use mil spec ptfe insulated silver tinned copper inside and honor the wire gauge of the original design. My experience is with 1980's 1990's vintage high end gear and have had amazing results along with mods based on long standing consensus in the DIY community as to the efficacy. Just be forewarned, opening the cover can lead to a deep rabbit hole. @larryi I appreciate your direct experience with a certain mod, but those that mod either for themselves or for business would stop doing it or be out of business if it was not highly effective.....
Peace