I'm just bouncing ideas here so don't take it too seriously:-
a) 29 entries with many people taking the full 90 seconds lead to a long time staring at a screen writing down numbers. Is a entry/time limit necessary (just in case) ?
b) Divide into classes ? Scored only within these classes ?
c) In = Take off, Out = Landing ?
d) Major prizes still drawn ?
e) Piero only allowed to fly a Barbie Pro Stunt™ ?
Owt else ?
Mike.