I take your points Trev. It obviously needs mods and careful setting up.
Back in the day it did have a bad reputation... to the extent that people extended the brakeplate levers in an attempt to get more braking power. (Obviously requiring a different handlebar lever to give the required travel).
There was a prevalent opinion at the time that there was an overheating/distortion problem with the steel liner, -perhaps caused by that rear shoe rubbing, hence your 'clock spring' mod. I also remember criticism that the pressed steel brakeshoes distorted unevenly when they got hot. And that inline brakelight switch was an engineering joke wasn't it!
Perhaps it was a case of when the bikes aged a bit, things got a bit out of whack, and therefore got the less than ideal reputation when hamfisted blokes (like me
) started restoring them.
Anyway it's good to know they can be made to work well.