I have done a lot of work with the Benedini TBS. It is a great sound card, and there are some interesting developments around the corner. You have to buy a programming cable and download the Benedini software to customize your own sounds, but you only need to buy this once.

I personally like the Benedini approach to building a sound track. I feel it is seemless and very believable.

It does not work directly with Heng Long electronics though

Panther G

It is not that inexpensive to build quality sound modules. Cheap is what you get on the RX 18 COB. There is no doubt cheap can be done better then what currently passes for sound on the RX18, but you have to spend a few bucks if you want programmable .wav file sound effects.