i have been home roasting and espresso extracting for over 20 yrs. needless to say, i have gone thru a number of roasters, grinders and espresso machines. my current set up is an hg-1 grinder, a expobar brewtus IV machine and a behmor 1600 plus roaster. i buy all my green beans from sweet marias. i have used a bottomless portafilter for the last year and a half. i added the ONA ocd2 to my workflow three days ago–prior to the ona i was using one of those knock offs from amazon. i have pulled nine shots with the ona and everyone of them has had absolutely no channeling and beautiful extraction right from the center of the filter. this is amazing to me–miraculous even.
1 Like