I have that very grinder. It's apparently good for everything. But not espresso.
I think there is a way to mod it to make it finer, I'll ask around as I know some people who tested it at beta.
By the by, what coffee dose are you using? You could go up in dose to increase the resistance.
@Chalfie started
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I have that very grinder. It's apparently good for everything. But not espresso.