Looking to add a cb radio to my bike, looking at ebay for a used one. Some sites say that the audio talk box controls only fit 97-00, is this true? There seems to be two different control boxes for the handle bars. One looks like you stack old controls (radio) on top of the cb controls and the other has both controls built together, is this right? Can you take the old radio control box off and replace it with the double cb controls? Will the electrical plugs interchange? You can talk through the intercomm system on the cb? I have seen sets with hand held mics. Any help telling me the difference in cb systems that were available back then would be helpful.