I have a hard time keepingg the wheelpants tight on my UCD. Maybe my YS120SC swinging an apc17x6 puts a few more vibrations through the plane than the 90-91 size engines many use. I do balance my prop, and I don't use a spinner. I have put CA in the screws that goes into the wheelpants/light ply einforcement, but to no avail. I am just removing my wheelpants and saving them for if somebody wants to buy my UCD. I am also doing something else that I have never done before he he, I am removing some of my tail ballast. I've been fling this plane so tail heavy (pitches up good when flying inverted) that the landings can be and often are a bit hard on the plane.
DKjens