There is also the rubberband connection between tailwheel and rudder. full description and pictures on the regular UCD thread already.
Both myself and the moderator EXCAP232 are using OS91 FS2s on ours. I am not into 3D yet except for the hovering part. The OS91 will hover and pull out slowly but that is on a 15x6 prop. I just got the 14x6 to try it out. That might do the trick to allow faster pullout.
You need the YS91 or the 120s to really do full bore 3d with this plane. EXCAP is talking about doing that because he does do 3D.