The angled faceplate+insert works flawlessly with the di2 junction holder. Wont bore you with pics, looks just the same just 1.5mm thinner.
Back to the Dolan Crack Champion project. Redesigned the jig from scratch in a simplified manner, and it seems quite sturdy. Now just need to make the sliding dremel mount and thats where the fun begins! :)
The plan is to mill it down to a 31.8mm diameter and fit a standard clamp on it. Ive got adjustable stoppers (bolts that screw into the nuts glued into the jig) on both sides to ensure consistent diameter.
PS: If you know of anyone whos got a Dolan Track Champion cracked at the same spot (there were plenty of them), let me know, I'd be happy to fix other's frames once the method proves successful :)