I already have the 3PK. you don't have to change any hardware on the transmittor to use either the FM, PCM,or HRS receivers. you just select the correct band on the transmitter. I'm currently using FM, and PCM receivers. want to try out the HRS to see how it is compare to FM and PCM.
Last edited by Jasonchi; 12-17-2003 at 07:12 AM.