RE: Ultra Stick 60 Challenges
PointMagu, same here, I love to fly this plane.
Mine has an MDS .68 and I've installed the ruder servo at the back (top) of the fuse with pull pull cables. The battery is as far as I could reach from the wing openning... no need for additional balance weight.
If you want a pic of the ruder install, I can post it 4 U.