if you want to flake them afterward, cutting them into rings before drying has worked the best for me
(trying to crush dried, halved pubes, was an effort and did not ever yield anywhere close to predictable sized flakes )
if you want to turn them into a fine powder, your going to spend a while with a mortar and pestle, i suggest getting an electric spice/coffee grinder
also if you haven't yet, try smoking some first with a fruit or nut wood (Peach, Cherry, Apple, Pecan, etc.) then finishing them on the dehydrator soo good
I prefer to use the pubescens peppers fresh mostly. but they make fine stuffed peppers, great flakes and powder, rings pickled or dehydrated (great way to kick the heat up in some soup and add some color with some dried pubescens flakes or rings )
can't forget sauce
Fantastic sauces or even just a basic mash can be made and used in many different dishes !
lots of ways to preserve and use the Pubes