Ironhide, The skymaster F-15 will fly on a P-80 power. I just saw one flying with the new PST-1300R and its aweson. Very reliable engine and it cost only $100 more than the P-80, but with 29# thrust. About waiver, like wojtek said. I start with turbine Roo, make few fligths with a buddycable. After lets said 5 fligths I was landing my jet still with buddycable. In fligth 7 I was solo flying and doing my demo. At that time The Turbine CD and two others turbine flyiers sign me up and get my waiver.

Good luck!