Do you have the Global waco 30 ARF ? if so it's a neat little plane. I watched one fly last weekend, not sure what servos he had but he used the Magnum 30 4 banger for power. looked to have pleanty of power for "scale" type flying, vertical was not unlimited but it had enough for Hammerheads and such. if it were me that Magnum 30 and some HS-225's on A/E/R Hs-81 for T would be the ticket. for more power try the Magnum 52 4 banger and standard BB servo's, I think it would fly"heavy" with the extra 1/2 pound in it though. CG may also be a problem with the 52.

John