Hi, at the moment I have a Bianchi 928 C2C. This came with a full carbon frame and 105's with an FSA crank. I have done 4,200 ish miles on it and can't quite tune the rear gears correctly. I'm debating, whether after this milage, it's worth upgrading all the components to Ultegra SL (http://www.merlincycles.co.uk/?fn=pr...categoryId=159)
Is it worth it?