I agree with RCKen fly the trainer to its limits of aerobatics ie. outside loops, inverted flight around the field, hammer heads, cuban 8's, etc. Once you can perform these manuvers with your trainer you are ready for somthing like a Sig Fourstar or other comparable aerobatic trainer. I have seen a lot of novice pilots at our field make the move to full aerobatic planes to fast with dissapointing results.