There's an old Klingon saying "Touch my pizza and I'll..." OOPS. Wrong Klingon saying....let's see here..."If it ain't broke don't fix it (unless it's Kirk's head)."
If you're doing good with FASA, don't change a thing. If you do, however, go for the Coda system and then come back here and we'll load you up with conversion stuff and ship ideas..etc...
I myself am running (soon hopefully) a FASA-made adventure using CODA-Trek...The Natural Order...and I've only had to convert very minor stuff.
Darth Sarcastic
"Shall I goto 'Red Alert' sir? It does mean changing the lightbulb." - Kryten, Red Dwarf