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@Brommers
I'd expected fitting the front and rear derailleurs to be nice and simple. The rear was, the front wasn't. The Di2 front derailleur has a little grub screw in it which is designed to brace the derailleur against the frame. Mr. Shimano provides some little stick-on metal plates to protect the frame from the end of the grub screw. However, due to the aero-shaped seatpost on the S2, and the funkily-shaped front derailleur mount, the grub screw was left dangling in the air, even when screwed in as far as it would go.
According to Damon Rinard on the Cervelo forum there are two options. One is to install the front derailleur carefully without the bracing screw and hope. The second is to build up a mount for the grub screw to rest against from epoxy metal putty. I went for the third option, which was to make a small aluminium block which fits against the seat tube, and over the lower part of the front derailleur mount. It's quite a complex shape, so I used my milling machine to rough it out and then finished it off by hand. The little recess is for the head of the pop rivet on the front derailleur mount
I glued it into place using the old bodger's delight, JB Weld, after giving the areas of the frame and FD mount I was attaching it to a bit of a rub down with some wet and dry to give the JB Weld a key to bond to.
And now the grub screw has something to push against rather than thin air:
I've now also glued the tyres (Vittoria Corsa CX Evos) onto the wheels (Zipp Firecrest 404 tubs). I knocked up a quick gluing stand on Saturday morning so that I could glue both wheels at the same time without using my truing stand for the job.
They're both done now. I've preloaded the tyres with some Pit Stop Evo TNT sealant (a very messy job) which has at least done an excellent job of sealing up the valve extenders. I've also fitted the cranks (FSA SLK - I think Ultegra cranks are very fugly, and that's despite owning two pairs) after having chased out the BB threads and faced the BB shell. So at the moment, things look like this:
Oh, and I've also swaped the stem for one less likely to make the Bebejeezus cry. But that's for my benefit, not his.
Next up, brakes and shifters.