Hey Crabstick,first off,i'll put my Belt CP up against ANY trex u have,and i'm will to bet,it not only does every exact same thing,but does it just as good! You are correct on the main shft size being the same as the trex,but can u get a fully CNC complete from swash plate up head assembly for you trex for less than 80 bucks? I did my Belt CP! Complete carbon upgrades ( main blades,tail blade,and paddles) for less then 30 bucks!

Now,if you were paying attenting,total upgrade price is 80 + 30 = 110 dollars. Whole helicopter in ARF form ( less reciever,transmitter and battery) comes with all servo's,hh gyro,3800kv brushless outrunner motor,simetrical main blades,tail blades and boom supports installed and was only 169 dollars. Now add 169 + 110 and u get 279 dollars for a fully 3D ALL metal rotor head 400 to 500 class helicopter. Now it might just be me ( meaning i'm cheap i guess) but a 279 heli that can do the EXACT same thing as 500 heli for half the price, just seams like alot better deal.

Good Flying

Art