Even though my gmail 404''d his address he did respond. ???
 I AM gonna try the BD NANOs. Simple enough to hear if two on the amp connects make any improvement or not.
Easier than AB ing cables.  And easy to hear if there is any there there.
Well the power cord seems pretty standard except of course the Black Discus stuff. No comment on that other than I went on the Mad Scientist site to find out what it was, not much info other than effects. But they will send you two sample pieces for free so if you're curious its $5 postage to see what you think. That seems reasonable to me.
They have some weirdly interesting stuff. Tried to contact these guys a few times way before covid. No answer. Moved on.