Most of the time I ride with three buddies in changing order, and each of us sometimes rides with buddies of his.

Problem is: Because of that, most of the time we have to re-pair before we start, and remember the order and who's A, B and C.

So how about something like an instant-chain-mode, which you can enable via voice-menu or computer?

When enabled, the headset would try to connect to another (listening) headset on switch-on for, say, 20 seconds, and after that time, if chaining succeeds or if someone presses a button, it listens for 60 seconds for other headsets that want to chain in (or, even better, always listen).

That way the first one in the chain would switch on his Sena, press the button to skip the trying-to-chain, then the next one switches on, both Senas connect (the first one stops listening, the second starts listening), the third one switches on and so on...

That way you could assemble a chain nearly in an instant, in the right order, even while on the road.