I'm about to be doing some system upgrades, and one of the items will be a pump. I know that quite a few people fill the kettle through a valve at the lower end of the boil kettle, thereby using quick disconnects. My question is this: how are you checking the gravity of your runnings? Are you pulling the QD off, taking a small sample, then putting it back on? Or are you just forgoing the gravity readings altogether, and going for volume?