Pigman I have three Norvell's and I don't care for them,never know if they will start and if they do how long will they run,and yes I know what size engine the planes call for,but I would rather wake up and have fun with the .25,and as Minn said,if the plane is balanced it will boogie and turn with the best,I have three different wonders with different size pull power,I like the FX.25 the best,next time I'll try the .32.