It was the Corona DIY conversion kit: http://www.giantcod.co.uk/corona-24ghz- ... 05857.html

It used to come with an 8ch receiver but that's no longer supplied with the kit (hence the kit being cheaper) so you have to buy it separately. There are three available:
4ch: http://www.giantcod.co.uk/24ghz-corona- ... 03381.html
6ch: http://www.giantcod.co.uk/24ghz-corona- ... 03382.html
8ch: http://www.giantcod.co.uk/24ghz-corona- ... 03383.html

I had some powering up issues with mine but I believe that to be a faulty receiver, as the Nipper guys used the same system without any problems, but once it was powered up, it worked well. For the relatively low cost it's certainly worth a punt though.

Quote Originally Posted by Roland
Talking of chains, would a cog and chain (What's the technical term?) Be more efficient supplying the other wheels than a belt and sprockets?
Yeah as Jonny has mentioned, it tends to be sprockets with chains and pulleys with belts
I consider both chains and belts to be pretty efficient in terms of transmitting drive. Chains are less forgiving, so if you try to push something that's too heavy there could be a risk of stressing out part of your drive system, whereas pulleys and belts might act like a clutch and slip, relieving some of the stress and protecting your components. Belts and pulleys are the lighter option although sometimes it's cheaper to buy chains and sprockets. I'd say either arrangement would work for your drive.

Edit: Sorry I didn't see your post Jamie! Hmm, I think also that if I get a DX5e it'll last me longer, and therefore will end up being a better buy, by mixing do you mean you can change the drive type? Or max speed of the motors?
Yeah I'd say the DX5e will probably be more durable and last longer so may be worth the investment (still got my £120 radio from eight years ago that works a treat).

Each axis of movement on a transmitter is one radio channel, and each side of drive on your robot uses one channel. Conventional tank-style steering is where the left-hand stick forward/back moves the left-hand side of the drive forward/back and likewise for the right stick/drive. So to drive forward, you push both sticks forward. Mixing allows you to have your drive controlled from just one of the transmitter sticks, much like a computer gaming joystick. So pushing the stick forward moves the whole robot forward, pushing the stick left turns the whole robot left etc.

The max speed of the motors is something that can be changed using the Dual Rates function (or Hi/Lo function as it seems to be called on the DX5e). Normally you set the rates to a percentage of the full power - say 50% - and you can toggle it with a switch, so for example you can turn it on during a battle and cut the top speed of the motors to 50% should you need a bit less speed and more control.