I have a Stinger 60 thats about four now and somewhat patched. I have a Mag 91 Fs that is a nice match. The plane flies where you point it, period. If you build one remember to carbon fiber under the leading and trailing bulkheads below the wing saddle. The plans tell you to score the fus. and epoxy the score mark, add carbon there and in front below the leading edge. I have seen three Stingers fail at these points......No other special problems and lots of fun.