Re:
Am going round in circles but think have decided on the blue bars. Probably.
However.....major disaster here this afternoon, cleaned out the seat tube as thoroughly as possible, and then was going all round it with the bore gauge. Anyway, general consensus seemed to be mostly 27mm dead, or possibly even a tad under! When, all of a sudden......
.......decided to check just once more, bore gauge sprung open, one end going very neatly straight into the breather hole from the top tube into the seat tube.
:evil: :evil: :evil: :evil: :evil: :evil:
This is how I lost my last bore gauge 20 years ago, and thinking about it now, the exact reason why I swore to myself to never use one ever again! And yes, I tried all the clever tricks in the book, including some I don't think anyone else would have thought of, but end result: it suddenly broke, the spring bit falling into the bottom of the seat tube where it's now stuck in the general oil and WD40 (there isn't an opening through to the BB shell oddly) and one half of the T piece is now happily rattling around in the top tube, never to be released ever again. There's no way of getting it out.
I accept I will have to just live with it, but think of all that extra weight.... :facepalm:
Cider. I need cider.