RE: Mato Sherman Electronics?
As long as the radio has DSM2 Technology you should be OK.
Here is a picture showing how the electronics all fit on a easily removable card. All you have to do is hook up the RX18 control wire and a speaker, and you have converted your Heng Long to a Tamiya compatible IR tank with killer sound. It honestly takes longer to take the top off the tank then to get the sound working. You would have to try real hard to fry anything with this set up.
Shown on the card is The Benedini TBS, THe DBC3, and an Orange 2.4 gHZ receiver. This set up can easily be moved around between tanks, and can be used in your fleet, without buying individual sound and battle systems. Yes all in you are looking at $255 for the complete programmed set up, but because you can move it so easliy your total cost to have sound is reduced as you don't have to buy individual systems for each tank. You still need to buy a Tamiya apple to make it completely compatible with the Tamiya system.
Once I return from vacation I will include this set up as an option to buy on the web page. It truly is one of the simplist ways to get a great sounding battle system with 2.4 ghz receiver in your Heng long tank.
Of course you need a Spektrum radio to make use of this combo, and you have to buy a programming cable to upload new sounds into the Benedini.
[youtube]http://www.youtube.com/watch?v=U0jsvUua8K4&feature=relmfu[/youtube]