Thanks CoolBees and 15th - good thoughts and just the input I'm looking for.
"I think the more important thing to think about is just making sure the bees have enough space when they need to expand. What they do with the boxes, whether brood or honey is up to them. The bees know best, as they say"
So, I'm going to use an excluder on top of my brood, because in my reading, it is my understanding that the SHB is more attracted to the brood, and keeping brood out of honey supers will also cut down on SHB larva in the honey. Has anyone else heard this?