Dave,
Most of the VLDs follow the G7 pretty well, but virtually all of the published figures are G1. There are ways to get a good guestimate of the G7 if you know what velocity the G1 BC was measured at.
I can't speak to the ULD RBBTs, since I haven't tested them, but id speculate that if the BCs are close to what they have been ESTIMATED /ubbthreads/images/graemlins/grin.gif to be the same will probably hold true. Just remember to compare the BCs in G1, and calulate path, and wind deflection in G7.