I can throw in my information on El-Mod here. IThe system is a stand-alone, full otion, hobby grade tank system. It is composed of three individual boards. One is the drivemodule, which controls all of the fucntions of the tank from driving the Tu's to all of the turret functions. You have 2 choices of boards, either the ECOor PRO, the latter simply offers more options, like extra machine guns, extra lighting options and so on. They otherwise work the same. Then we have the sound module or Soundblaster as Elmod calls it. Again 2 options here. One uses one speaker, the other can use 2 speakers and double the amplification for them. The last component is the CSI module or Battle system. this is comprised of a board, and apple (reciever to take hits), and the emitter which is the LED that fires at the opponents in battle. The thing about Elmod that I like is the complete control it offers to tweak the way the tank functions. This can be done via dip switches on the boards, or for even more control over parameters, Elmod sells a configurator optionally. this plugs into the board and you can then change any parameter in the tank, like how fast the turret can rotate or the main gun elevates and depresses, how fast or slow the tank accelerates, or how much inertia the tank has. One other thing elmod has that I have not seen in any other system, is the ability to actually brake the tank. Not like the others, where you pull the stick back and the tank slams into reverse. It brakes, like a real vehicle. I think it is a great thing that was integrated. Sound files are on a card and can be changed very easily to whatever type tank you are using. Also, you can create your own sound files and load them into the card. This does have a learning curve, but it can be done with a little patients and some practice. All in all, Elmod will cost you about the same as a Tamiya electronics package. Is it worth the price? Well, I believe so. I have bought about 5 units in the past couple of years and never regretted it. Also, the system today is different than the l=older gernerations. These are plug and play and are not difficult at all to install. Simply follow the instructions which are available in PDF files for whatever system you buy and that's it. From my experience, Elmod offers great versatility, very realistic sounds and driving. Is it for everyone? No, but it is well worth trying at least once. Any questions, feel free to ask.
</p>