Wow.... You must have the patience of a saint...
I'd probably end up tossing the half-unwound tranny through the nearest plate glass window, before I got that far along.
I have a "dud" Z-565 that I had considered performing an "alien autopsy" upon, but I never had the "drive" to undertake the operation...
It's still kicking around somewhere in the cellar in one of about fifty boxes full of "iron"
Definitely a lot more complex than the usual series wound multiple tapped primary, the paralleled windings and bifilar secondary are what make the tranny so good!
I'd bet a lot that the ill-fated E-bay "Handwound" A470 "equivalents" aren't so artfully crafted.
As I recall, the Z- 565 "equivalents" read only 76 ohms per side primary DCR, in stead of the more normal approximately 195 ohms per side. yeah, they were pretty much crap...
/ed B in NC