The build

I’m hoping there will be a bit of gravel left over. I want that for my paths in the garden.

The best way to do this is take what you need for the paths out first then the just make the rest do. You could always supplement it with some of your own gravel, if you have some, at the bottom.

Yeah, that’s not going to work. Being really generous towards the ditches with my estimations . I’d need 8 of those bags for my paths.