Warthog, Paul is correct, the Saito is heavier and weight is not a good thing. The TSI should be more than enough for 3-D work as will the OS. The Saito however will work fine, but you may want to consider the 100 rather then the 120. The C.G. on mine is at 4-1/4 back, if you go past that it becomes too hard to hold straight lines and landings get tough. Control throws are more important than C.G. For the ailerons you will need about 25- degrees, for the elevator you will need about 45-degrees, and for the rudder use all you can get. Use about 75% expo to soften the control input around center when in 3-D mode or you will over control the plane. You didn't say what prop you are using, try an APC 16-6 or 15-6 for the most static thrust. Be very carefull with speed when in 3-D, it's easy to over-stress the airframe. Hope this helps