Well, I actually got 83% BUT! that's because it was a really big beer and it didn't suffer from not topping up for the initial runoff, because there was so much material to work with so I thought I was the sh!t. The next one I did had a normal-size grain-bll, and I hit 63% and thought WTF? That's when I realized I needed to do the top up. So that's pretty much on-line with your numbers. Now, with the top-up I'm routinely over 80%.