I spent the afternoon completely stripping it down, cleaning it up and reassembling. There is no book or manual or such-like that shows how it's done, but to be honest, there is nothing that difficult to work out.
Okay, the brakes have a spring system and you need to work out exactly how it goes back together so that it works effectively, once reassembled, but it only took me half a minute to work it out as it's not rocket science. The most important thing to get right is reattaching the pedal units so that the brakes work correctly. My advice - if you're not a confident fiddler, leave them on and clean them 'in situ'.
In fact, you would be wasting your time removing those housings unless, like me, you accidentally pull out one of the plugs that connects to the brake potentiometer. The reason for that, is that the pots are the flat, sealed type - so you can neither disassemble nor clean them.
The rudder pedal pot, however, can be completely disassembled, and I would advise it as mine was very dirty. It sits down there on the carpet all day, every day, and picks up an amazing amount of crud. I wiped the carbon resistor pad with some IPA (alcohol) on a cotton bud, then put a swipe of WD40 on it, before wiping off the excess, again, with a cotton bud. If you're unsure, here is an excellent tutorial video on pots and all you need to know:
http://youtu.be/rUkrpqEmXb8
The results are amazing. After recalibrating, the brakes are working perfectly, and the rudder is like new. Well worth the effort.
so we will see how it goes. Touch wood I think I'm warming to wards it. 
