And then possibly a nice supercedure queen cell. Congratulations!

"I added an Additional box of foundation less frames under the top empty super. That gives them five boxes total so I hope they have enough room for now."

Even a 10 lb swarm should fit in 3 mediums of drawn comb. They'll draw foundation quickly, and need supering sooner than later, but five should be than more than enough room. My strong colonies fit in a 3 medium brood chamber. Exceptional ones sometimes get a 4th, during the main flows, when they are no longer thinking of swarming and have plenty of super space.