Not so big 1 uF box caps?

[croquet hoop]

Thanks for the formula, this should be quite helpful.

Regarding my yellow 1 uF cap, I found it here while searching for info on etching faceplates: http://www.madbeanpedals.com/builds/reports/zpsdx/index.html

The sad part is that they are...

AVX box caps (no, you cannot get these any more)

Too bad. but at least the matter is settled. No more mystery.