I just got G4 this weekend. I was using FMS. I'll never use my FMS again! I'd recommend buying a used version of G3.5 for about $100. You'll be able to get a good deal on them now that G4 is out. My hobby shop guy even tried to sell me an "opened,but practicly new in the box" G3.5 for $125 when I bought my G4.