Mike,

a buddy built a Dreamer exactly as designed and it flew fine. However, he did feel the ailerons lacked authority to do the do the roll rate he was used to ( really fast). I built one about three months ago and installed a Tower mini servo in each lower wing to drive the ailerons. Rolls are pretty much a blur. The double servos retained the simplicity of the original design and (I think) makes it roll about as fast as most folks would want. In general the little plane is a great flyer and a real blast to fly.