After reading through your posts, it seems like currently the only thing that is holding you back from running in STF is your lack of a cat. No cat and diff will both throw you right into FSP.
I'm also located in Orlando, but usually don't go to the SCCA run events (except when they're at the OCCC, or down in Sebring).
Martin Sports Car Club is another central florida auto-x club. Our next event is Sept. 9. I run in STF and wouldn't mind another person to run against.
2003 Twilight Blue ZX3
BBK, Quaife, Spec stg. 2+, Fidanza, and more...
2006 Pitch Black ST
Cold air intake (HID retrofit coming soon)