Before I start I ordered my lights on 6/11/10 and they arrived on 9/12/10. I'm experimenting with the bar mount. Forget the O rings, they don't work even on the road the light vibrates!!
I bought another bike mount from CRC however i'm struggling to source a grommet, I've been to screwfix and the plumbing cnetre and tried various ones but nothing they seem to stock has done the job. I live nowhere near a poundland!! There must be an alternative???
This is quite a good link and would solve the problems, but it needs soldering!!
http://www.el34world.com/Misc/bike/BikesLights38.htm#
Surely somebody must make a straight forward off the shelve bar mount for MJ lights?
Lumicycle do a mount that works well for under £10, but you still need a slightly longer screw to make it work - you've probably got one lying around on a reflector/cheap light mount which will do the job.