The Flash 3D is identical in every respedt other than the flying stab, which is even made from the same EPP foam as the stab elevator. It worked so well I tried it on my Zoombi. Here it is with the flying stab and a booster tab on the rudder to take some of the load off the servo. With the extra rudder throw that the tab gives, it does knifedge loops much tighter. Another point, at these slow speeds that the 3D planes fly at, much stab and rudder area are very essential. Even high alpha takes a lot of throw and precision.