@ A37575 - Not trying to be a smart arse, but the Alpha 160 isn't in the LSA category as it's fully aerobatic.
Agreed it is a little different to do formation in aeroplanes of vastly different performance. I have been in a Cherokee taking pic's of a CAC Mustang, which was a bit different to say the least! The Cherokee was throttle to the firewall and the Mustang had the gear unsafe warning horn blarring - apparently activates at low speed if gear not down. It requires a good briefing and understanding by pilots concerned.
Sure, Roulettes don't use flaps, but they most definitely use the speed brake on the PC-9's. Speed isn't just regulated by the throttle in these machines.