The drones produced by LW will be smaller if the eggs are laid in worker sized cells. Just had an example of that yesterday as I was going through some new splits about 2 months old. Lots of small drones crawling around in one of the hives! The bees don't make worker sized cells larger to accomodate drone eggs laid by LW. So you can reuse the frames for normal brood once the LW problem is solved, which can be an impossible mission. The best and only way that I've found is to give them a frame or 2 of eggs and young brood, and keep doing it as long as it takes to get them to build queen cells. If they don't succeed in about 3 weeks we take them out and shake them out and remove the boxes so they'll scatter out among other hives. 
