It wasn't today but actuall the last two nights. I stripped the cables, deraileurs, shifters and chainrings and bar tape off the bike and fitted a new 52t chainring, new ultegra derailleur, new ultegra shifters, new cables and new bar tape. The shifters too a little longer than I anticipated, had to work out the new routing (my old ones were external and these are internal) and cut the cables to length. If I get time tonight, I'll put a 11-28 cassette and 25mm tyres on my spare wheels (fit them time dependant), new pedals on the bike and shift the shim from below the right cleat of my old shoes (which are about to fall apart) to my new shoes.