forgot to mention in my earlier post, if you spray your line ( mono or braid) with silicone, most types of 'bobber stops' seem to slip out of place a bit easier. i've been using it on my summer catfish rods for several years now, haven't noticed the knots slipping YET. it does help to keep scum from building up on the line in the warm summer months.
attn: some types of paint will not adhere to surfaces coated with silicone. you will need to scrub or sand them. fred