In my humble opinion... The weakest link is always the (loose nut behind the sticks)the flyer, especially with todays radios.I know some of the best flyers in the world that use little to no expo both thumbers and pinchers. Arch Stafford,perennial top end finisher in masters uses very little to no expo and convinced my son early on not to use it. It can be somewhat of a crutch in my opinion but I need every cruth I can find. I've flown my son's planes with no expo and it only exagerrates every rookie mistake I make. Arch uses the approach if you need to smooth things out lessen you control surface throws. Maybe good for new dogs like my son but I'm and old dog. Different strokes for different strokes>>>>>
RC