The rest position of the rear brake pedal has always seemed too high for me. If you ride with the boot over the pedal, it presses down on the pedal quite a bit, so I end up riding splay-footed on the right like a duck.
Took a close look at the rear brake setup and there didn't seem to be a lot of downward adjustment possibility. The 8mm lock nut was too thick.
So, dug around in the metric junk box. The stock lock-nut is 13mm across the flats and 6mm thick. There's a smaller version 12mm across the flats and about 4.5mm thick, and that 1.5mm makes all the difference.
Replaced the lock nut with the smaller version, snugged the clevis as far up against it as it would go. Now when riding, the boot just kisses the pedal, no danger of continuous application, but easy activation when you want.
Yippee! Only took 12 years to figure out.