I have an old 27mhz radio, from Heng Long. They make tanks. I bought it for an exuberant price from my brother. I want to upgrade it to 2.4ghz system, with ease. All I have done is cleaned the internals, and remove the spring that resets the throttle to 50%. Can anyone give any advice or tips, or even if it can't be done at all. If anyone would like to see, these are pictures of the RX and TX.