Hi, has anybody attended any maintenance courses in London? Any recommendations? General experiences? It has to be said I know *nothing* about the technical aspects of bicycles, not even the main terms. When the guy in the bike shop explains to me what's wrong with my bike and what he's going to do to it (bless him, he keeps on trying to talk to me...) he just gets that blank look from me. It's embarrassing. I want to be able to deal with a puncture and know what happens if you tighten some screw or other etc. They all seem to be pretty expensive though.