YOur email did not work for a reply, Barry.
I have the answer for you:
"The cap used is a North Creek Music systems 10 uf Crescendo. Measures around 10.6 UF. You could use a 7 UF Solen and bypass with something a little brighter to get to the 10 - 11 total capacitance. Clarity or music cap or what flavor suites ones fancy."Above is Direct quote from JOhn Busch.