Mel! - One thing to mention is that they grind easier and smoother still hot. And a pinch of sugar would not hurt, or sugar substitute. Just don't go overboard with either the sugar or salt. In either case, don't eat too much peanut butter :-) Just two Tbs has 130 calories from fat.
Have fun experimenting. If you don't have a food processor, you can even make it in a blender, but if their still hot, they'll turn out better.
I have a juicer also, and you can make a good peanut butter using that also.
If eating tasty stuff is a sin, I am certainly going south.