I took a file to one side of the RH pedal on my cyclocross bike... I have been getting an incredibly annoying squeaky sound from that side when riding the bike. I did a 100 km ride on it a couple of weeks ago and the noise was there for over 6 hours, doing my head in! I have SPD pedals on all of my bikes. The ones on the other bikes are the cheap, simple and totally reliable Shimano M520s. The ones on the CX bike are M530s, which have a small platform area round the SPD mechanism. It gives a bit more support to the foot. The trouble is, it does that by having the tread of the shoe making contact with it all of the time. My feet rotate slightly through the pedal stroke; I hadn't realised how much until I rode a few miles with my feet fixed in place on another type of pedal - it felt quite uncomfortable and I yearned for the missing 'float'. Anyway, I am pretty sure that the movement of the tread against the platform is what is making the noise. (I tried adjusting things and lubing them but it didn't help for long.) The tops of the platforms have started to wear from the constant movement of the tread against them so I decided to help the process along and file down the remaining high points. I have done it on just one side for now so I can test my hypothesis by clipping in on the filed side or the unfiled side. If the bodge has worked then I will file the other 3 sides too. Other 'fettling' was to replace a tube on the back wheel of my best bike. I had pumped it up before a ride a couple of days ago but the knurled nut on the end of the valve sheared off when I tried to retighten it. Air pressure held the valve shut for the duration of the ride but it was only a matter of time before I had problems with it so I thought I'd sort it in comfort at home rather than ending up doing it at the roadside one day. After removing the tube, I tried reinflating it and what I was expecting to happen did - without the knurled nut to hold the core of the valve in place, the core got blasted into the tube and was lost. As soon as I removed the pump, the tube instantly deflated.