I have started on the install of the Di2 now. It required me to strip everything off the bike that wasn't needed leaving me with the frame and the saddle, everything else has gone which seemed a bit brutal. I have got the electronic cables in, the hydraulic cables in and cut to length and the levers on. I realised that the battery mount would vibrate and bang on the frame if it wasn't supported by another bolt which would mean drilling a hole in the frame. I decided to contact the manufacture in China with a question about this and was relieved to hear back within 24 hours that it would be perfectly ok to do that. So I drilled the frame and fitted a rivinut which is what the manufacturer has used elsewhere on the frame. I guess I could have bled the brakes and fitted the chains etc but I didn't want to rush and I was feeling cold so I stopped at that point. It has been fun so far.