After Stuart degreased the gearbox I attacked it with a nylon bristle brush in my electric drill. Please with the results as it means I don't have to strip the box to get it blasted. While we were at it we replaced the shagged 17 tooth sprocket for a new 19 tooth one.
I then started on the brake pedal. I've been deliberating as to whether I should use the rear sets or mid controls. Today I decided to pull my finger out and make a decision so mid controls it is. All I had to do was finish various half made parts and weld them together. That got the pedal made and a brief session on the lathe had the operating linkage made up.
At this point I realised I had started to get tired and was likely to make mistakes. I'd already managed to start a minor fire while welding. Fortunately Stuart was there to help put it out but he had to go and when I managed to start another minor fire I decided to call it a day.
On a final note it appears that the thread for the rear brake caliper banjo is a bit shagged. I'm hoping that I can rescue it with the appropriate tap. As I don't have one (M10 1.25mm) I've just ordered one from ebay.