I like having my own grain mill because of the process mostly and being able to control the crush. I used to use a drill on my Barley Crusher but just use the hand crank when I brew now. (I haven't brewed in about a year because of an ongoing move) . To me, hand cranking through 10-20 pounds of grain is part of the brewing zen. I weigh out the grains crush them, then weigh hops and package them with the boil time the day before I brew. I think of it as brewing foreplay.