@everyone who's commented based on actual experience with my builds, or myself I want to say Thank you. Word of mouth has been integral in keeping me building these products for the past 15 years and I greatly appreciate it.
@smodtactical No worries, and it's much appreciated! On that amp, I don't know how much of that went to the chassis he had Core Audio custom build for him either. FWIW, we started with my baseline amplifier and the client then chose all of the parts he wanted to upgrade at actual manufacturer's cost per part over stock. He demo'd my stock piece which is what inspired him to go over the top on these amps. In my opinion, there's definitely a point of diminishing returns WRT parts cost versus increased performance, which may be why they have not sold. I'm just guessing here... However I have seen my standard Super 300B SET sell several times, for a decent percentage of MSRP (after not being listed for very long). I'm always forthright with suggesting where to put money as far as component upgrades to gain audible improvements, as there are those components which do not always exceed expectations.
Best regards, Aric