Originally Posted by trickyvail
The Yak 54 also does not have a removable wing. The wing spars are permanently glued together - making transport more difficult. I have a Yak 54 and the horizontal stab (even with carbon fiber rod glued to the leading edge) is prone to flutter at high speed. I'm guessing the SU-31 is like the Edge 540 with harder/stiffer wood in the stab.
Hope we get more feedback on this one!