This may be a little OT, but I have 1000' of crushed stone drive, and a large circular drive in front of the house. This stone also packs down HARD! My neighbor has a back blade and couldn't break it up at all. I went with a DR Grader,with carbide teeth and a grader blade, and it broke the crust and smoothed out the drive to a like new condition. I go with what works, and with stone at the price it is, it would take a minimum of 8 trucks to tailgate it out at app 2" deep. Instead, 2 hours with the grader and it's a new drive. I drag the drive about once per month, maybe every two months and it stays looking good. Haven't had to buy stone for over a year now, and it looks like I won't for another year or two.
Just my 2 cents,