Yup, Lukasz confirmed today that the 6H13C tubes I've been raving about are indeed the same as stock tubes. I guess I've come 'full circle' - or more of a
dysfunctional circle anyway
... first getting my Elise without stock tubes in favor of experimenting with recommended tubes, then finally six months later I happen to 'discover' the stock power tubes by total random chance, when searching for affordable tubes that appear to have a
vaguely similar construction to the GEC's, only to discover they are my #1 kings so far - yet are ironically the same included in most orders.
However my setup is not identical to stock, using hand picked GE 6SN7 GTA's and tube bands on all four.
Also that's right - my 'Christmas tree' setup has now been far outclassed in just about every way. (by the Svetlana 6H13C tubes) Sadly, this unique 'act' will likely be disbanded soon by yours truly - anybody fancy a strange Christmas decoration? Additionally, I have been tubetized (tube baptism LOL) into a new man - more of a one-tube-per-socket guy for the foreseeable future.