Hi pmillen. I used the kitchenade attachment to grind the meat. I know I am very much an amateur meat grinder, but if it is always this easy, no need for a dedicated grinder. I took a 3# chuck roast, and the actual time to cut it into pieces and then grind was about 10 minutes total. This included grinding the meat a second time, which I have read on this site and others is the best way to go. I have to say it did turn out fantastic. Burgers cooked to a perfect medium rare. The one thing that might disappoint is I did decide to use my charcoal kettle pit rather than my RT for this cook.
(Sorry to original poster if this hijacked the thread....but it was grinded and cooked on the 4th which is still in the theme).