 Yeah, and there are products that make it really easy to do that, like Quikrete has a product in the red bag. You pour it in there. The post's going to rot fast. Well, then you water the hole, and then that solidifies. In certain posts, that's important if it's a gate poster, that sort of thing. But I find most of my posts, when I put them in, I fill them with stone, and I compact the stone with a tamping rod around it, and that's plenty strong enough.