I mounted the smaller size of the Texan, it's recomended a 0.47 size of engine, but I used a 0.60 O.S. and it flies like a "yellow angel", of course at 50 per cent of the gaz, but remember what we say in Spain: "Ande o no ande, caballo grande". Don't now the exact translation but it could be "Go or not go, allwais the bigger horse".