This weekend I went down to Pedalplay and really got to work fitting the back end together.
I cut the 4° 6mm slots in the stays for the dropouts, and angle-radiused them to the bottom bracket and seat tube respectively.
Its coming together pretty well so far.
Theres still some minor alignment to do, but its almost ready for welding.
Using the tow strap worked pretty well to hold it together while
mocking up, and was a snap to undo and remove a stay for filing.
(Though, it pulled the dropouts on a bit of an angle. The pix are not
of the final fit.)
I still haven't found a suitable rim to build into a wheel with that disk hub, but I'll be working on that this week.