A full featured 2.4 ghz system can be had from HK for less then $30, and is far superior to the factory 2.4 ghz system that come with these tanks. I have set up many tanks with these and they work fine. 6 channels with proportional control on channels 5 and 6. As far as structure durability goes all transmitters are solid state electronics housed in a plastic box. I have had apart many brands of radios and there is little to differentiate them on the inside construction wise.
Do these HK systems come with both sticks self-centering, or have components that make it self-centering? Been looking for answers on which of these radios have them....