Well guys after 9 years of owner ship I finally finished my thumb brake, mind you this was the 6th attempt. I had tried many options, a lever to cable to lever actuating the master cylinder of various sorts but could never get enough pressure to operate the brake.
This latest incarnation gives great feel and operation, not enough to lock the wheel but real slowing power. Add to that the satisfaction of making all parts myself it a great feeling. Just had to share with you all. Oh why go to all this trouble, had a bad prang about 30 years ago in which my lower right leg had to be amputated, hasn’t stopped me though just a lot slower then I used to be but lovin every second.
I'll let you know how it works out.