Mighty fine looking grind you got there SL! Love your power grind system too!
Hope this helps, sorry for being such a space cadet~~~
Ya know, your post has got me to thinking. I've been using a coffee grinder, and even though I'm dealing with a lot smaller quantity than you, it takes a while, since it only holds a small amount at one time. I have a KitchenAid stand mixer with the meat grinder attachment. I may have to experiment with grinding the peppers using the disc with the smallest holes in it. It will probably end up with flakes instead of a powder, but it won't hurt to give it a try.
Thanks for sharing your ingenuity with us!