How did you get on with those washers? I have the same pump with a disintegrated washer. I've tried the 7/8" tap washer (too small) and a 1" tap washer (too big), and both appear to be too thick anyway. I was thinking the leather cup washer might be the best alternative (not sure what size) but...
Nice job. You might be interested to know that, whilst Claud Butler did sell frames separately, they also sold each model as a built up bike. I have both a 1970 catalogue and a late '60s Electron bike (which I plan on restoring at some point) and both point to the fact that all your components...