The good news: I’ve lost some weight. The bad news: my pants are now threatening to fall down. I’m committed to buying new pairs as I am able, but in the meantime has anyone had success with something like the Invisibelt? I often get that 'gaping in the back waist' issue anyway, so it would be nice to have something that would help. I do alter when possible, but pants and jeans waistbands are some of the hardest things to alter well.