"Had my interconnect cables custom made to be 10’3.47” long….mathematically this is the perfect length as all the distortion has plenty of room to disperse."
Well that is true for one specific wire manufactured in a particular way. The math changes when you vary construction and gauge and strand thickness.
Cable cooking and freezing can change the math when it alters the metallurgical structure.of the conductor.
You can reverse the cable and the math will change. Wire has a best way for proper electron flow.
Avoid laying speaker cables on a bare floor as wood will change the flow of electrons and render your mathematically precise calculated wire to then be incorrect. Ceramic tile will not unless you have tile with heavy iron content. Also avoid finer wool carpets as they are prone to static electricity buildup which can effect your outcome too.
Sarc now off.