I built the Seniorita this spring, "stock", without ailerons. She flies great. I put the rudder on the right stick(aileron). I used an OS .25LA, which seems to pull her around fast enough for me.....as long as the wind is under 15mph. Otherwise, she likes to "hover" against the wind, and trying to land is pretty nerve-wracking. She doesn't want to come back down.
If you want to build a wing with ailerons (like I do), Sig sells a stock wing kit you can modify with the ailerons. Just remember to cut the dihedral by at least half.
Good luck!