Yeah, I made a set of number from a scrap of white coro, some zip ties, and a Marks-alot. I have two modules for my JR TX, and I usually swap the number tag when I swap module, mostly to remind ME of what channel I'm on.

For my new Polk system, I think I'll make up some single diget tags on clothes pins with white coro and the marker. As long as I don't have any RXs on 22, 33, 44, or 55, I should be fine For that matter, I'll only need one for "6" and "9", since there is no 66, 69, or 9anything

The info on it being an AMA "rule" was in line with what I thought I remembered.