I have only done this to one pack so far as an experiment. I didn't see any noticeable difference in population over the course of the summer. By removing the first couple of frames of capped brood you are removing only 13200 in population which in the grand scheme of things, is a minor setback in population. I am not removing all capped brood, just enough to offset the original population of the package, which I theorize is enough for every mite that came in the pack to enter a cell. Within a few days of doing this other capped brood starts to emerge.How much farther back does this method set a new package?