Which Groupset?

Actually a very good solution .. sadly I cant on mine give the size of HT :(

No, fitting it in a stem is a good solution. Using it as a head badge is not.
Sorry dubtap but fugly and will get covered in bugs and crud.

I thought the accepted method was to extra strength double sided tape it to the under side of the stem?

Mine's zip-tied to the stem but the coolest (off the shelf) one I've seen is probably the TriRig Sigma stem...

3T seem to have a similar thing.. but the box isn't in the stem.

is the shimano 105 hydro brake group for sale anywhere yet? I can't seem to find it.

It's a non-series, goes by R685, should be out in December (UK), it's available from Bike24 as far as I know.

Yes, see the previous page. Bike24.de have them. I can verify this as mine arrived yesterday.

6770 canny go on stem; 6870 can

Why can't it go on the stem? I thought it was located near the shifters?

Meh, 11 speed DA Di2 or GTFO. :)

Because cables enter both sides and need enough play for handlebar movement .. i have zip tied mine to brake cable.

vs

cheers @edscoble and @andyp

That would still fit in the TriRig stem wouldn't it?

Atm I'm using an old Ultegra 6500 9sp.
I was considering spending around 400-500€ and get a new groupset that fits better the build // that it's 11spd // that is compact.
In that range of € I'm considering the new 105 11spd (5800 I belive) or the Rival22.

Shimano all the way up and spend the rest of the money in other upgrades // epo?

ultegra 6800?

http://www.chainreactioncycles.com/shimano-ultegra-6800-11-speed-groupset/rp-prod110818?utm_source=Google&utm_medium=Shopping&utm_name=UnitedKingdom&gs=1&gclid=CJGop-T2ncECFc7HtAodVn4AXg&gclsrc=aw.ds

That's like 600€...

I've decided the 11 speed 105 groupset on my Pinnacle is very "meh".

If you zip-tie your front wiring harness control box to the stem then you can a) see the light clearly and b) operate the button easily:

I was considering it. Can you elaborate a little? Nice one

Why?

It's 105 and £340 after all.

Ultegra 6800 £459.99 at Ribble atm

noob question - what's the weight penalty of running disc brakes over calipers?

Hard to say, as your rims don't need a braking surface the wheels can be lighter.

My 7970 box is zip tied to my stem without any steering issues.

But you need more spokes etc.

If you are seriously considering discs over callipers then marginal weight gain shouldn't really be an issue.