I would like to get back on topic too - sorry to the OP, but with all the helpful tips we have to share it is easy to get sidetracked. I have taken to printing these posts to put in my scrapbook because they are so helpful and colorful. The scrapbook project would go faster if I could find more goat pictures though, since that is the theme.
Back on topic: How many shots can you pull before changing out the coffee in the portafilter?