I built a grain mill from on old pasta machine, it took a lot of tweaking but I finally got it crushing more than one grain per second and can get about 1kg done in 5 mins. The question is, is the crush ok?
Looks a bit coarse to me. You should ideally be looking for a mixture of fine and coarse. There's a fairly recent thread viewtopic.php?f=2&t=65615#p690112 which might be useful.