For those that might not know... the 17 Sport is completely convertible to the race version. The only difference is the jib / forestay assembly and the boomless feature for the main sail. The Sport main sail has been the race cut since 1995. Earlier Sport models were made with a shorter foot and a harken track / boomlet. With more recent versions... Change the forestay, add a boom and rotator... you have a race 17.

The FX1 spinnaker package or even the Hobie 16 system should work great on the 17.

Horizontal cut main sails? In the first production run (1985) there were horizontal cut, solid color Mylar mains. The change to the current vertical cut was very early in that first year.