Originally Posted by
jnjtandem
Congrats on your new Calfee!!! We also just ordered a Di2 Tetra ourselves and asked for the D-Fly addon ($60 or so) for that very reason. The D-Fly easily wires in and attaches to your rear chainstay. FYI, it also transmits DI2 battery level via ANT+ which can be received by Garmin Edge 810 and 1000 models. From what I've read and youtubed, the setup just takes a few minutes. I'd think this is a huge plus for tandemers... somewhat similar to the extinct Shimano Flight-Decks.
Did they ever update the firmware on the 1000 so you can have multiple bike profiles?
Edit: Sorry, I read on later and see OP doesn't want a garmin.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"