Eureka Mignon Single Dose Blow Up Bellow

This bellow does the job. The set up with the single dose hopper was very easy. I do feel that I’m still getting retention but I think the problem is the single dose hopper not the bellow. Air escapes from the hopper itself before getting down into the machine where the grounds are being kept in the burrs. It does help but it’s not going to get everything still. I put 17.5g in, and 17g came out. Then I pushed down on the bellow (probably 6-8 times rather aggressively) and another .4 came back. So the grinder still retained .1g. Not bad. But not zero retention. Anyway, good product.