You are talking about several modifications which are not H-20 Class legal.

You might be able to re-cut the jib, but it wouldn't work as well as a new jib designed for the self-tacker.

The H-20 needs a self-tacker and a spinnaker, but I doubt if H-Corp. would ever do it, because it would draw sales away from the Tiger and Fox.
As a matter of fact, I expect them to cease making the H-20 soon.
They killed the H-18 and H-17 last year.

I am surprised that Performance hasn't started reducing their number of models.