get a Di2 specific frame; look at those westbrook deals and others. Get Fm066 and put a few spacers.
In S2's case Cervelo actually has an official guide http://www.cervelo.com/media/docs/S3-S2-Di2-installation-guide-bbeedde9-7885-4006-a35b-ae536c326ddf-0.pdf
@amey started
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get a Di2 specific frame; look at those westbrook deals and others. Get Fm066 and put a few spacers.
In S2's case Cervelo actually has an official guide http://www.cervelo.com/media/docs/S3-S2-Di2-installation-guide-bbeedde9-7885-4006-a35b-ae536c326ddf-0.pdf