I have the oppertuinty to pick up one of these radios from a guy that I race with. I am curently running with a hitec lynx 3d with the spectra. Love the spectra and dont really want to lose the option. I am pretty sure that the spectra module will drop into the radio, but will it work? I was also told that I will need to add a chip to the radio to make it work. Am I correct with any of this. Any insight would be appreciated.

Yes, the spectra module will work fine in the 3PK. No mods needed.

...Ok, what is the "spectra" module? And what does it do?

Spectra module is a synthisized module, no more crystals. Just like the Novak Switch.