Has anyone tried these do-it-yourself earplug kits, and if so did they work for you? They are only rated at 26nrr but thought I would try them out. When I molded them to my ears they fit real snug and I had to work them out the first time. After they cured fully, they don't fit as snug so they aren't doing what I expected of them. Just wondering if anyone has used this product and is satisfied with it.