That's not how it works.
Defining one angle means the relationship between the perpendicular fret and nut is within a fixed range but doesn't give them fixed position at all.
If the bridge is angled 10 degrees, the perpendicular could be at 12th fret and the nut also at 10 degrees, at any scale (the scale relationship is what's fixed). Say the longest string comes out 25.5"
I think you misread me. If they put out a fanned bridge, it will have a fixed angle. You'll have to design your fan around that angle. I can fire something up with Hipshot's fanned bridge -the ones they put on Deans that aren't usabe for my scale and perp fret location.
I can't take a fixed fan bridge with my 2 scale lengths with my desired perp fret at the 6th fret and make it work. That's the point I was trying to make.
Hipshot already makes and has available fanned fret 8 string bridges btw - they're just not on the website.