I bought a bunch of tiny zip-ties in assorted colors, then wrap a loop of zip tie on the AI transmitter in a certain color (say RED), then wrap a loop of that same color zip tie (RED) to the AI wrist unit....so that RED goes with RED. On reg set # 2, I'll do the same thing, but use a pair of (BLUE) zip ties, (different color for different reg set). If you have more reg sets than you have colors, you get creative and use, say, TWO zip ties, so that say, reg set # 7 is identified by a GREEN/BLUE combo), so that you're using a total of 4 zip ties to identify that reg sets transmitter/wrist unit pair.
