blender/hand blender is good, you can just pulse blend it to your desired level, although its almost the same as your coffee grinder. You'll be able to grind more,
If you want less debris, dont have the bud completely bone dry, this will help alot.
The problem im having is that the resin is sticking to the blades and inside of my blender and no mater how much im scrubbing with soap etc, its stuck on!