ok , i am using a dx3s as of right now. looking to get a 3pk and would like to use my recivers i have now. what module would i need? i have seen 2 spektrum modules and just not sure what one i need.

EIther of the DSM ones, the standard SPM1104 or the Pro SPM1114. The HRS mod will not work with the receivers.

Those will only work with the DSM but not DSM2.

Sorry to bring up and old thread, but I am looking in buying a 2.4ghz system for the 3pk as well but dont want to spend a whole lot. I was looking at ebay and found some fake knock off 2.4ghz RX/TX combo for cheap and was wondering if anyone tried those and what are your thoughts on them.