Had a bit of problem with the brakes on the dirtsurfer at the weekend. Although we put it down to very wet conditions, subsequent inspection of SW's brake made us realise it was actually locked up. Turns out the Dirtsurfer brake pads were completely worn. So much so, that the pads were actually touching each other over the top of the disk. ie not even touching the disk when braking.
A trip to Halfords and £14.99 for a set of Tekro Gemini-Novela pads (needed a hole drilling in the back) seemed to do the trick. and a complete strip down, oil and rebuild, seems to make the thing work better. Although I'm not convinced that the Y-brake cable we fitted a while back actually helps, as it gets clogged with sand.
So... currently looking into hydraulic (sealed) units from Hope. I'll blog more about this when I find out.