Allex:

I have had both with YS 63's in them. They both perform about the same, the UCD a little easier to hover with. The 60 sized UCD with YS 110 is a much better flyer than either the flip of 40 UCD for some reason. My facorite of all time (a lot of time) is th Swaney MOJO 40. Have not had the 60 yet. Considering my many years experience, 71 yeas of age, slowing reflexes and deterioriating eyesight, the mojo recommendation whold be worth considering. With the YS 63 in it, can not complain in any direction. Loves to hover, elevator and all that good stuff. I have not found a flying attitude the airframe objects too yet!! A very solid flyer which a old gieser or novice will benefit from. ENJOY