I just inherited my dad's early 70s Cooper and am starting to think through the updating process. Not interested in keeping it as a period correct museum piece-plan to have rear triangle set to 130mm thinking more of a fair-weather commuter with details that appear period correct- for example, barcons instead of brifters, silver instead of black where applicable, brooks saddle, etc...thinking of going 2x9 with a range of 12-25...welcome all thoughts and experiences with bikes like this which have been cold set for drivetrain upgrades.