AeroPod, PowerPod and Newton

I've tried doing a search on 'Profile' but the forum search just tells me 'too many'. :( I'm using the iPro on two separate machines - a road bike and a TT bike. Both use wireless mounts. The set-up procedure on both has been done (including calibration rides) and both set ups work fine. Using the i...

What is the clear ring on the iPro mount? It's 2 or 3 mm in width and sits round the outside of the silver pins. Mine came partially adrift and so I had to remove it as it was snagging the pins. Is this a water seal - and am I OK without it? (Although I must say that the head unit doesn't feel as fi...