I finished my build today (RIM Version, Ultegra Di2 11 Speed, Chameloen color).

These are my observations:

- I had no DI2 grommets in the package
- ride feel is very good; paired up the bike with Giant SL 1 55mm on 25mm tyres
- build was straight forward for the most part

PROS

- ride feel
- paint job is good
- handlebars are very nice looking and offer a good feel for the bike (I used a Deda 70mm expander with the handlebar- that should be secure and sound)

CONS

- DI2 hole for the RD is aweful; I had to drill out the hole (someone did the same - thanks for the tip here in the forum/ I went crazy while trying to fit he cable)
- no torque values anywhere aside from the handlebars (more or less a guessing game)

And edit tells me: I need to 3d print something fot the DI2 battery since it's "secured" by bubble wrap atm.

Yep - I was referring to the 11sp Di2. Barend it is then. I had the groupset for rim braking laying around for ages and figured I will build up a rim brake bike and landed here and ended up with the Model S.