RE: Ludwig/ Heng Long king tiger E-100 build
I had a really really crappy time getting the elevation to work right on my KT. Finally, the light came on and I mounted a heavy servo to the cannon and plugged it into my Accessory RX which is controlled by a rotating knob on my Turnigy 9X. Now, it works great, no problems and moves the barrel realistically. Plus, you don't have to mess around with your right stick trying to find exactly where the control is for the elevation.
tjs