To expand on this:
If i have my 48.8mm 2×10 Xt crank and add a single Race Face NW ring, i’m expecting the chain line to now be 48.8mm (centre line between the 2×10 rings + 4.5mm (half of the distance between each ring
= a Chain line of 53.3mm.
Minus the 2mm Race Face NW offset = 51.3mm
Now add chain ring bolt spacers to get 47.5mm = 3.8mm spacers required.
3.8mm spacers is a lot, i suspect to much fort he crank arms to offer a from platform for the ring to seat against.
Removing bottom bracket spacers on shimano cups is not advised, due to the shorter cup threads on the non drive side of the Shimano Bottom Brackets. Do other manufacturers like hope etc.. have this issue too?
As it stands, given my calculations are correct, i suspect being able to emote 1 of the 2.5mm spacers to the non drive shade and using 1.2 mm chain ring spacers, would get a near perfect chain line.
I’m looking for anyone who can conform my calculations against real world measurements. Or any other / better ideas for getting the chain line as close to, if not perfectly placed.