I live in south OKC near Moore. You're more than welcome to come to the field at Draper Lake, just bring your AMA card. As for the engine selection, the guys at my field are amazed at the power I get out of my Thunder Tiger Pro 46. It is supposed to be based on the last model OS before they went to the AX. For my Skyraider trainer it pulls it really well. Speed with an 11x6 prop and lots of torquey vertical pull with 12.25x3.75 APC prop.