Robin did your plane come in today? I don't think those servo's will work on ailerons. [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDEM0&P=0]hitec servo link[/link] the ailerons require 70 oz/in according to the manual and these are 61oz /in @.23 sec. pumping them up to six volts will bring them into spec but I think those babies will be working very hard... That is prone to failure. Sure they look good at 17.99 at tower but I think you're gonna haveta fork over more dough. Either that or fly mildly like you would a cub. One good high speed dive and the resin gears will probably let loose. Those ailerons are as big as closet doors.
Time will tell what will be adequate for sure, but for now we have to assume that Sig made their recommendations upon testing and failure analysis of some sort. Wouldn't ya rather someone else reports that they aren't adequate? However if ya go ahead and install let us know if they work ok. I'd kinda like to know if they feel warm after a flight.
"That's just my opinion, course I could be wrong" lol