Thank you gentlemen.
Your information was most helpful in eliminating some of the possible causes my ignorance'd allowed me to consider. No significant changes in the line size or shoe spring strengths did indeed leave the masters. And in that both are cheap remans (from the same supplier) I got in a parts swap it seemed reasonable that they shared a common problem.
That problem turned out to be impeded rearward travel of the piston/cup in the (I prefer single pot) masters of both the Toad and the HAMBster. Both due to excessive resistance in the pedal mechanisms and both failing to fully uncover the relief port from time to time as suggested.
In that I like a bit more overkill than that, after freeing up the two movements I added an external pedal return spring and adjustable pedal return stop to each. The (very thin appearing) return springs inside the masters simply weren't up to the job of pushing the pedals fully back unless everything stayed perfectly free. So now all those inside springs need to return are the pistons/cups, which they manage well enough.
In the case of the Toad I simply cobbled up a heavier duty brake light switch bracket with the pedal return stop on it as well, then added spring end holes to the pedal bar and the hanger lip.
For the Barn Job I only had to add the spring as I'd put in a return stop at the pedal when I designed'er.
Both are working correctly now.
It's nice to be able to adjust the brakes properly at last.
Dan, I'll keep the link and I may someday go to those self-adjusters but for now I quite enjoy the regular upkeep of the Toad. Perhaps when I hit my seventies ........
) the road at that time.
