I haven't gotten brave enough to wear my packer out yet, I'm terrified of it falling out. Boy, that'd be hard to explain.
I was thinking of trying one of the diy harnesses but then decided to sacrifice a pair of women's underwear and cut a hole in it for the packer to fit in. As soon as funds allow, I'm going to try finding some men's underwear that doesn't have the flap in them and do this with them.