Selling my M11 Radio is in good shape, works well, Screen is nice and clear, near new Protek 9.9v lifepo4 pack (Cost $38) and comes with Giyoung Frequenz 2.4ghz Module (2) and 2 Receivers to suit. With this set up you can kit out another M11 and use one car each if you wish.
Info on the 2.4ghz gear is at
www.giyoung.com but they claim a response time of below 5ms which would make it quicker than the M11X. Range is outstanding, they claim 2-3km, I managed to get my Baja just out of sight with full control.
These only work with Giyoung receivers, but they sell them on Ebay for around $30 ea. Not an internal hack job, the module has an internal Antenna and is a direct clip in / out so if you want to use another module on the radio, you can.
Selling as I want Telemetry.
Sold!