For some reason, I've ended up with a sleeve circumference that is 4" larger than the armhole (as it's based on width). This is clearly too big – what's the right way to reduce circumference?
I got a slightly larger sleeve circumfrence too. Then I realised I failed to take out 3/4" for the seams in the underarm at .44 for the side body panel since that's going to be taken out before the sleeve is set in and shouldn't be counted in the armhole's circumfrence. If you happen to be drafting a side body as well maybe take that out and it should get you at least a little closer to the mark.
I got a slightly larger sleeve circumfrence too. Then I realised I failed to take out 3/4" for the seams in the underarm at .44 for the side body panel since that's going to be taken out before the sleeve is set in and shouldn't be counted in the armhole's circumfrence. If you happen to be drafting a side body as well maybe take that out and it should get you at least a little closer to the mark.