We tried several types and sizes of props with the Evo 36 / PT- 19 and found the Zinger 11/6 Pro to work the best. Fuel is 10/22 Powermaster (11% castor, 11% synthetic, 10% nitro) using tank furnished with acft.), small venturi, and needle valve set slightly rich. the engine is located in original mtg. holes, offset by one 4/40 washer top and bottom under front holes in engine mtg. lugs. Airplane controls are set for minimum throw, adj leadout is moved back toward center of wing, 1 oz of lead outboard tip weight, cg balance is good with no additional weight needed..018x60 lines spaced close in Fancher type handle. I think this is about as good a setup as we can do with this acft. The pull on the lines is good. This in my opinion is not the best trainer, but setup correctly, it flies well, my flying buddy Richard Grogan can pretty well do most of the pattern with it while I am just happy to fly again after many years. The Evo engine runs well and is very powerfull. Bob