RE: Leaning to hover a UCD 3D, how do gyros work and will it help.
if you have a computer radio try a set up which is for prop hanging only.
the most obvious changes would be full throws and much smaller amounts of expo so that the controls are "there" in the stick centre.
don't go the gyro route except as a last resort. Also, try to tune for he best engine pick up that you can (new glow plug?).