I would say you would want a glider in the 4.5m range for a P-70 if you wanted to do aerobatics. Check out SoaringUSA, they have a 4.4m Valenta Fox and its a real nice all composite kit. Also Esprit Models has a few options too. Alot of there stuff is monokote wings though. Depends on what you want to spend and how long you want to wait to get it. There are many options for a P-70 though. Cheif Aircraft has a 4.6m Swift S-1 that is a beautiful kit and high quality but its $4600.00, made by Krill Models. I had an Airworld 4m Fox with a P-60 and it was a good match, plenty of power for anything I wanted to do.