JB works great with a 250K pot, just like the lil59's. capacitor: doesn't matter that much to be honest. 0.022 or 0.047 will work fine. the 22 will go less dark and make it a bit more 'honky', the 47 will go really dark. I prefer 22 because the end is more usable (and to get that sweet spot with the 47 is more cumbersome than with the 22).