I had the same thought on how slowly they will sink. Somebody correct me if I am wrong, but doesn't the deer bugs float because they hold air bubbles inbetween all the hair, similar to the hackle on a dry fly? I didn't know if all the air would come out when they start to sink. I like the idea, have been trying to make a shad profile one, and I really can't get it to work on anything smaller than 1/8 - just not enough room to work.