Dave, I have to do mine as well. Had to do it last year but started leaking again.
Me, ex vice president of the WTFIAS club. Guess who the president is.

Fairly simple. The only thing is to work out how all the brake bits fit together again. adjusters, clippy wire lead thingies and brake shoes.
The routing of the cable is quite tricky.
Once you got the whole lot dismantled, brake incl. back plate the shaft comes out easily.
I always stop at not having a size 36 or thereabouts ring spanner to undo the nut.