you're right, no links for the RX channel changing mod. odd, i wonder if i missed it...

well, anyway, this might help. i took a picture of the AAs RX, the red box is surrounding the 3 solder pads that you would use to change the channel. in the picture, you can see the three pads labeled C S2 B, and S2 and B are soldered together, and this makes it a B channel. if you want to change it to C channel, you just need to unsolder the bridge between S2 and B, then solder S2 and C together. if you want it an A channel, you can just leave all three pads unsoldered. its not too bad, since the pads are right on the edge of the RX. i also added an mspaint drawing to show how the pads would look for each channel, just to make sure things are clear
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Thanks so much, MicroBuilder. This is great -- now I get it, and now I see it (and I actually do think I saw this elsewhere, now that I'm looking at the pic you posted). But of course, one question always leads to another. In the course of disassembling my AA to get at the Rx, I broke off the very thin antenna wire from where I assume it connects to the Rx. Now there's a 1/4 inch piece of antenna wire sticking out from the open end of the boom. Do you know where I should connect this wire to the Rx? I couldn't find an answer to this in any quick searches of the forums.

Thanks, once again.