So, I was able to use akAIO 1.8.1 (the R4i Gold version) on my R4 Ultra (which is basically the mutant hybrid child of an R4 and an AKRPG).
I've tried using all of the latest releases (currently 1.25) I could find of Wood R4, and the latest Wood RPG (again, 1.25) since there's most likely not...