Some people can't handle psyllium. It blocks them up. Have you looked at colosan or Oxypowder ? They use oxygen to liquefy the old junk in your intestines. Maybe that would be something to try. When I take psyllium, I HAVE TO drink an extra quart of water for every tablespoon or I get constipated.
I've used the Master-Cleanse lemonade for one day fasts, half day fasts, as a meal replacement. I think it's fine to use occassionally.
Pre-ground cayenne is fine. Organic non-irradiated is best. It is WAY hotter than the stuff at the grocery store!