OK, I will jump in here and see if I can clarify what mtmansl is proposing. I believe the proposal is to run F40 GTL, F40 GTU, and F40 GTO classes. All 3 of these classes on the track at the same time for a sprint race.
These classifications have nothing to do with the existing GTL, GTO and GTU endurance races other than they may share bike eligibility rules.
btw: F40 GTU and F40 GTO would be fine, but I don't think having SV650's (F40 GTL) on the track with S1000RRs (F40 GTO) is a very good idea, particularly since it could be experts on S1000RRs and novices on SV650s.