so many thanks for the replies and kind words everyone.
(part of my post from another thread posted here for future reference, the swarm is the one pictured in post #1945)
"my caught swarm is approaching 2 weeks since moving in to the swarm trap with no signs of efb. the swarm ended up covering the better part of 10 deep frames and in less than two weeks has them almost completely full of brood and stores. the capped brood is completely solid and the open brood is 100% pearly white.
i added a second deep yesterday with 10 frames of empty comb. 15 of the 20 frames in that hive are frames from efb deadouts that i have sanitized to the best of my ability. some goes for the hive bodies, inner cover, telescoping cover, and entrance reducer.
if i see no efb once this colony fills the second deep with bees, my plan is to make as many nucs from it as i can. i'll do this by introducing a foundationless frame to the middle of the broodnest and then split the queen out a week later. a week after that i'll make as many nucs as i can with the emergency cells."