Wow, I cant imagine an O.S. 1.20 on a Funtana!! Must weigh a ton... my Saito .72 powered Funtana feels like a pig at 5.5lbs, till my tank is half empty, then if feels good LOL. I'll bet the power at your altitude is probably equal to that of a Saito 100 at a 1107' feet like I am, just seems huge for that plane Thats what makes this hobby fun though, being a little nutzo now and then!