I have a fairly reliable SuperSix Evo from 2013 with a compact chainset. I love it and it's fantastic all round...except when I'm on the flat or heading downhill. I know the compact means I can climb easier, but I'll never be Pantini and there's not a huge amount of climbing in Stockholm (where i live). Is it easy to upgrade the chainset to 53/39 and is this something I can do considering I might only bike 100km a week? Any pointers would be appreciated.