I recently found this PDF on the "Freeman Beetle Trap." I was wondering if anyone has made these, and has had any luck? I've tried the "Better Beetle Blaster" with mineral oil with little success. (I prefer not to bait with anything that could go rancid as I prefer to open my hives as seldom as possible.) I've never really had a SHB "infestation" but I do see them on occasion and figured if these were at all effective, it wouldn't hurt to swap out my bottom boards.