I had attempt number 3,546,754 to try and make the back brake work on my 1951 Rudge roadster.
The front brake has always been pretty good (in the dry) but the back brake wasn't achieving much. I know rod brakes have a bad reputation, but it should still be functional.
I could see a lot of play on the pivot point at the bottom bracket. The holes had elongated with wear over the years giving a lot of unhelpful movement. A while ago, I had a got a big bag of assorted rod brake bits and pieces but on closer inspection, they're all a slightly different design.
So today's brainwave was to solder two washers of the right size on the outside. I didn't really have the correct flux for this job, but managed anyway. Not as neat as I'd like, but seems strong enough and has now survived a 30 mile ride. The brake feels much more positive now, but the brake blocks seem to have got contaminated with oil. The brakes are much better all the same. I'll try some new blocks.