I just opened my .52 4c Stearman and love the quality. I am about to but a Magna .52 4 cycle engine from Tower Hobbies. I did some measuring and the .70 size magnum is too long for the plane. Has anyone put a .70 4c engine in this model and if so how? Also any feedback on Magnum 4 c engines. They are much cheaper than the new .56 OS 4c engines. [8D]