So I've got my ballast box full of rocks/boulders but its not quite enough. I've still managed to lift the back end off the ground on occasion. I'm getting ready to fill it with concrete but I have a couple of questions.
I've got 3 80# bags of quickcrete that have been in my garage forever, I plan to use those but I'm guessing I'll need probably 3 more? I just have the standard box, no extension. When you guys did yours were you able to mix it in the ballast box or mix it in a wheel barrow and then shovel it over? I haven't played with quickcrete much other than setting some fence posts.