John, just because there is a DPN number does not necessarily mean there is a class per say.
I know there is a good amount of taipans around, but they are scattered all around the US. So I am sure the T4.9 running stock jib with F16 mainsail should NOT have a problem.
Just use the f16 rating two or one up.
My feeling is that not having a self-tacking jib and having a narrower boat are penalties to the T4.9. I think using the new main and the old jib would be perfectly fine and fair. It will be a liability in heavy air and downwind but a slight advantage upwind or reaching in light air. This issue probably affects only a small handful of us scattered across the US.
