by coffee.me on Fri Apr 10, 2009 9:10 am I got a dozen a while ago and I love how they give me that extra 0.5mm-1mm of clearance. Without any installed, my PF locks at 4:45, with one it locks at 6:00 and with two it barely locks at 7:02:37
.No, alone, they won't transform your coffee but at a fraction of a $ I highly recommend them to my fellow espresso-nutz
