You don't need to pull the leaves till they fall off but it won't hurt either.

Cut a 3x2 inch piece of light colored, stiff paper like a white magazine cover. Use this to gently tap underneath one of the upside down sacs while holding the paper there. If yellow powder drops on the paper then its good. Your plant will give off pollen for a while just wait till those other sacs turn upside down. You only need a very little pollen to seed a bud. I say go ahead and do it. You never know when you might need to start fresh.