The coffee grinder is fine and I use one, but I agree it is not necessary.Polly Rosborough used just a bowl of water with a dab of dish detergent to mixhis dubbings, and this works terrifically. Pour the results into a seive, rinse(surprisingly almost NO fibres will escape through the seive), and flip onto apaper towel to try. In about an hour you will have a handy little felt ofdubbing that is easy to put in any container or mini zip-lock. Great for smallbatches.