Is there a way to determine how strong a hive is in order to split with this method? It seems to be a fine line between overflowing with bees and swarm crowding. I have a hive with a prolific laying queen that has most frames covered, but not what I consider "overflowing". I added the 4th box last week (all medium 8-frame in my apiary) The plan is to pull her and all but one frame of eggs and open brood (maybe I should leave two?) to start a new hive. Leave the old hive in place to maximize production with the coming flow.