having run the SV cougar for a few months earlier this year the old O ring wing mounts were a pain, breaking the o rings or even the tie wraps replacing them.... my cat sx3 is much better and having the fixed versions, 0 maintanance.... althou in major crashes you can split the rear wing.....
but rather that than the fiddly regular O ring replacements....
I say go SX3 version. it rocks..............
