Dry sift with Mids?

Ok, So im stuck in an area where I can only get Mids in large quanities, Eseentially brick. I grind it all up, about 8oz each time I do it, Shake it through 3 screens, All being bubblebags wrapped around 5 gallon buckets. I get about a 9g yield if i weigh everything together. While it seems good im wondering if its really worth it because ive heard some people say all of the heads are broken in brick so im just kiefing out plant material, but im sure some of the trichs have to be worth it. THoughts?

Hmm I wonder if the yield would be different if you made bubble instead of shift, but hey it could just be time to grow your own, that is exactly why I started.

Luv my necropost... but does anyone have any info on this... :P