One option considered was to scrap the whole thing and get a new bike. A bit rash may be? Well, I thought so too, so I've taken the plunge and invested in a wireless electronic groupset running SRAM eTap. Although still pretty revolutionary, I preferred this over Shimano's Di2, as the latter would have had bulky cables and battery packs to thread through those dreaded down and cross tubes, and wireless seemed so much more forward thinking.
I went for the SRAM Red eTAP with the WiFli rear mech to handle cassettes up to 32 teeth. This enabled me to reinstall the Tarmac's original semi-compact chainset (52x36) which I replaced with a compact back in 2015 to handle the Devon hills; the reason being that I would be able to have more teeth on the rear due to both moving from 11-28 to 11-32 and from 10 to 11 speed. Trust me, this is the perfect setup for this area. This will allow me to spin on a climb and still pedal on even the steepest descents.
I set up in the corner of my friendly bike shop; more for moral support and having access to all the right tools. I felt the real bike mechanic! I had booked 2 days off work to complete the installation; I'm a project manager by profession, so knowing my mechanical capabilities, having plenty of contingency was key! As it was, the removal of old and the fitting of new bar tape, leavers, cassette, chainring and derailures, including tuning, took around 5 hours, so I was done and dusted before closing time.
I still have a little bit of fine tuning to do, but the change is dramatic. No more sore wrists pushing on cables and no clunking, rattling, missed gears to contend with. Yes, I'm going to have to keep an eye on battery levels so as to avoid returning from rides on a fixie and walking up hills, and I'm a little lighter in the pocket; but I now have the equivalent of a £6k bike for a fraction of the cost and one that works, looks great and should at least last me another year!