I been using a bean grinder to blend dubbing for many years. It really blends materials nicely once you get it down you'll be surprised how evenly your blends come out. A couple of tips, When you press the button down to blend don't push it down and hold it for a while this will ball it up and almost melt some synthetics. Give it a tap almost like hitting a key on your key board... tap-pause-tap-pause-tap. have a look at how things are going, repeat if you need to. Once you have achieved the blend you're after write down the different dubbing you used to make the blend and the pattern you tied with it and put it in the container with the blend. You'll find you can use almost anything to make some really custom blends, tan crystal flash w/ tan dubbing to brighten it up, spikey, multiple shades, and on and on. Synthetics that have some length to it you'll want to cut it to shorter lengths depending on what you're after. Enjoy your new venture, let us know how things go.