In reply to DreadyCraig: Just tried the trick described in that forum thread, of cutting the J1 and J2 jumpers on the circuit board. Hey presto, lap timer and barometer functions as well! You need a size 1 philips screwdriver, tweezers, and a magnifying glass. There are quite a few fiddly bits so don't lose any of them. It will of course invalidate your warranty. It worked for me, but you might irreparably damage your £20 watch - you try it at your own risk.