Thanks for your responses. Appropriate servo selection is a question much easier asked than answered. I am flying 46 size 3D planes but I want to move up to 8 - 12 Lb 3D and IMAC style airplanes. From what I have figured out so far is that servo torque is only one of several factors to be considered. A trainer and 3D plane of same weight have very different servo needs. The trainer can get by with a slow servo with just enough torque. A 3D plane needs more torque, more speed, and better control resolution for more precise control and feel. With costs of servos ranging from $15 to $90 (reflecting improvements in technology), this is getting to be very difficult to figure out. Part of the fun of this hobby for me is to figure out the technical aspects, but going to the field and asking the guy next to you will probably always be the safe way. I found another servo calculator at R/C Aircraft Proving Grounds, but have not compared the two. Does any have any experience with Vexa Control ServoXciter? I have one on order.