Gang,
My first Di2 bike. Always liked it. Always preferred mechanical Campy to other mechanical groupsets. Early Di2 was good. Latest Ultegra Di2 just hits it out of the park with improved ergonomics and overall refinements.

Just pulling it out of the box today. Been shopping for new bike for a while. Cervelo's new R3 for 2018 is the bike for me across the board. It is everything I want in a bike...incredible stiffness and ride comfort...very light, my size 58 is 16.5 lbs and I will likely switch to a carbon handlebar soon and frameset has subtle aero cues. Frame is sub 1000g. Cervelo took 150g out of the new rim brake R3. Changing the wheelset would make the biggest difference, but I don't race and can generally keep up with the A group guys.

They nailed the geometry...not uber slammed but not kiss your sister endurance geometry. I like the Emonda a lot, I just like this bike even better from the 2 bolt seatpost traditional and non proprietary seatpost compared to the R5...to the 'threaded' non conversion Bbright BB...press in cups threaded together...doesn't need Loctite to keep quiet and converts to Ultegra crank which is my fav and comes on the bike. After all these years of making Pressfit, Cervelo is stepping up with their 79mm wide shell version of PF30 offset 11mm on non drive side they call BBright whereby they thread the cups together. Finally, they are answering the bell. Don't have to regress all the way back to BSA and outboard bearings and can have wide shell and companion massively wide chainstay cake and eat it too without creaking. Most know its lack of lateral retention that makes pressfit creak and threading the cups together to form a unit solves that without Loctite aka glue. . This BB is an elegant solution that was too long in coming. Very light and about the stiffest in the industry and will fit a 30mm crank if you prefer Rotor or another long spindle 30mm crank option.

But I am a Di2 newbie and so a basic question to those that have ridden Di2 for many thousand miles. I can set it up ok with on line help and youtube videos...will go first on the stand in day or two...
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Debating whether I will work through the Di2 baseline tuning procedure...will see how it shifts on the stand.

But my question is...what happens if a shifter button is pushed to shift either the front or rear derailleur without the crank spinning to effectuate a shift? Will this break anything? Is there a motion sensor in front or rear mech that blocks a shift if the crank isn't rotating? Or.. do you guys suggest be careful about leaning the bike against the wall to not accidently shift the bike if the crank isn't rotating?

Also, any advice or lessons learned about set up or tips you learned the hard way would be appreciated...thanks.

A pic pulling it out the box and a pic of what the bike will look like on the road. It is a navy blue with red stripes. Downtube and BB and chainstays are massive. Cervelo says the stiffest bike they have ever produced It looks it. Seat stays are spaghetti thin in contrast. Previous R3 has won both the Paris Roubaix and even the TdF. If I were to describe this bike, with its frame angles, HT, trail, wheelbase, stack/reach, it is basically a kinder and gentler Tarmac. A Tarmac SL6 won't beat you up either but a more frenetic ride and pure race bike with nervous handling many racers prefer compared to the R3. But this bike will rock when you push it and a bit more composed when hammering along.. A race bike without the hard edge as I am no crit racer.