Michelle your missing someone, time to update that link.
Does he react as in stop/run away when the cat gives him a nice correction, or does it just make it worse? It's pretty much the cat corrects around my place. (well the two that don't want to eat them) I'd definitely try the leash to make sure he gets the correction as suggested.
I only had issue with Ben trying to eat the cats, but that was my own fault from before any cats were ever around. I tried the leash thing with him, and it was effective ~ only problem was the cat didn't cooperate. If/when I would get his attention focused on me, and correct him for his ill eat the cat behavior ~ the cat would normally follow within eating distance. Of course, followed by hissing, swatting, death wish actions.
With him, (yes I just gave up) the best thing was just for neither of them to ever be loose together. One or another was to be in a crate, or in a closed off room. If nothing else the leash was there to provide a correction, or grab the dog if need be.
The other two at times get a good swatting, or Tucker gets bit during hard games of wrestle. Otherwise, there is harmony. She lets them know quickly when to be left alone though.