I've done a first dry run of taking out and replacing the front inner tube. It went ok, I think, although it took ages and several viewings of videos and reading of threads on here. Here's my question - assuming that you're fixing a puncture or replacing a tube whilst out on a ride - do you turn the bike upside-down or just lay it on its side? The one that I did in my garage was with the bike upside-down but it's such hard work trying to flip it over without clanging anything on the handlebar. Thank you