Hey Mark.. True on the "Do" and coupling, I used to use a mix to help it, but have stop
useing it, my new "Do" seems to do K.E. better than the last one.. And I like to just fly
it now without the mix.. I was told spoilerons would help some in wing rock by trying
to even the lift on the lifting wing?? I tried it but did not like it.. But I may have not
worked with it enough.... Using the largest dia. prop that your engine will twist always helps!!