Solving the pectin problem with walnuts: skim the foam, double up your cheesecloth when it look like "this is about to go down" filter into a second pan for another 30 minutes outside, double up the cheesecloth (meaning fold a piece over into a metal colander) again into the final pot and do the rest on the stove. Zero cloudiness in my experience but if you don't skim you'll really see the pectin build up.
Fun ride, if you have them - use them!
