OK, just to keep things organized, weigh in here on your name classing ideas. Of course that's based on the big "IF"...

OK, some notes-

IT-

.....GT....stilll used in certain areas, and the old American Sedan class before it outgrew IT rulesets.
.....T....comes after "S", but ITT in certain areas is a class for mini trucks
.....U....reminiscent of the old IMSA GTU class...allows expansion for future an even faster IT class called ITO
.....O...sounds cool, and the old GTU cars are really in S and A anyway.
.....R...Not sure about the logic of this one, but I don't think it's used yet. R for "race"? What are the other classes?
.....X....lots of guys think all wheel drive as the manufacturers denote their AWD models with an X, others think "X" sounds cool...sexy, experimental. ooookaaay....
......5 ....if you rename the lower classes 1-4, 5 allows for 6, etc expansion.
....other??