Which Groupset?

Need some new gear cables for my Campag equipped bike - is this £3 set from Wiggle's 'Lifeline essential' range going to be rubbish?

http://www.wiggle.co.uk/lifeline-essential-gear-cable-set-campagnolo/

All I've ever used

Forum approved chain for a Shimano 11 speed drivetrain? Ultegra, 105 or something KMC/Wipperman flavour?

Whichever cheaper TBH, as they need replacing sooner than later.

Kmc x11el are nice and not too pricey.

I like the fact Wipperman come with the reusable link.

Always used KMC because they were cheaper, but splurged the extra fiver on a DA one last time. It's run smoother and quieter for a fair bit longer than the KMC

Is there a way to use my 10sp bar end shifter as a downtube shifter?

No nails

Yup, just need that conical spacer, think you can get those on SJS

5-bolt 110bcd Compact chainrings for Di2:
Older Shimano 6600 (not designed for Di2)?
SRAM X GlideR rings?
Praxis rings?

Praxis

Really? Thought they were being slated for wearing out fast which was why I was looking at the Shimano (also in the hope the shifting was better).

Not aware of rapid wear

Hmm. Maybe I should sort my RD out before fucking around with rings.
I have them now and they don't look that bad to me. I was just going to replace the whole lot at once though because I'm an idiot like that.

Just because I don't know about it doesn't mean it doesn't happen.

I know but I poked the RD tonight too and it wasn't the springiest it could've been. Perhaps its slackness is what's contributing to slow changes rather than any chainring wear.

You can program di2 to shift faster

Rotor NoQs are what I'd recommend. I've had issues with Di2 and Praxis rings.

It's not a Di2 specific issue. It's physical chain movement because something is worn.

Press the button harder.

I punch all my gear changes.

Silver, 5 arm, 40t, narrow wide chainring, reasonably priced. Does such a thing exist? I have googled. Is oven-cleaner my only option?

What's reasonably priced to you? 104 bcd?

Superstar do Silver, might need to hunt around for 40T, looks like 38T is their max unless you're after a 110bcd version. Oh wait, 5-bolt? Err..
http://www.superstarcomponents.com/en/i-o-chainring-narrow-wide-style.htm

Stronglight do 5-bolt, 110bcd, silver, 40T:
http://www.ebay.com/itm/Stronglight-5-Arm-110mm-Alloy-Silver-Chainring-RD110-/120576056736

Sonic Cycles do Gebhardt which have silver, 40T:
https://www.soniccycles.co.uk/products.php?id=100&cat=2

I knew I'd miss something from the list - 110bcd is what I'm after yes!