That's a fair bit of theory - I have never found engine side thrust setups to much good - I do end up simply trimming rudder a click usually -from "dead on" Also as a SWAG -2 degrees on most areobatic setups seems "OK" neither too much or whatever .
This setup seems to be quiet solid in holding verticals -I would guess now and flow it a while -that the actual additional side thrust is pretty small
my electrics are the only ones where I can really test the thrust thing accurately -as I can hold them and do trim tests as I hover em
The math is interesting tho thanks!