I'm reluctant to use my coffee grinder for grinding spices. I believe that the odors of coffee and spices will influence the outcome. I am thinking of getting a grinder just for spices. Somehow can't picture grinding fennel or cumin seeds in same container as I grind my coffee. I use a portable grinder. Up to now I have never ground my own spices, but there are some that should really be ground. Do any of you use same one for both or use separate ones? Thanks for any feedback.