Thank you Frank, I did open the page from the address bar and found the following info about Alex's balanced output design for the APL 3910:
"Unlike all of the available Balanced output machines using a simple Op Amp for Single Ended to Balanced conversion, or the even more complicated designs called "true balanced" using twice more components on the signal path, the new APL Hi-Fi Balanced Output is actually giving you the sound quality of a Single Ended Triode drive. The actual phase splitting is done by the secondary windings of the output transformer while driven from the same Single Ended 6H30 Tube stage. This component-less Balanced output design gives you the Ultimate sonic performance with all the benefits of Single Ended Designs. . . "
The modification costs a modest $249. I am not qualified to comment on the engineering merits of this solution, but if it indeed it worked, it would deliver the sonic benefits of a traditional balanced design at a fraction of the price. Any comments from Alex, Dan, and any Agoners with either qualified EE knowledge or listening experience of similar designs will be appreciated.