Yes, they go in the stab. About 2" out from the center-edge of the stab and foreword is far as you want WITHOUT HITTING THE STAB TUBE jest clearing it is about right. As for one 8611, enough torque but its a large control surface, you are better off with two so they don't flutter. If you would use Hitec digitals no match box is needed if you know someone that has a programmer. Mount all the servo's front to back not that sideways thing[:-].