robo, my first thought was that this was one of those things-one might rather take it to the grave than to share with others, or should i say, is being used by such people.
robo, mother and doughter co-exist for a shorter period of time, it's not like you could use this to have 2 queen hive, it's just a very easy way to requeen the hive, that's the point of doing it, requeening
this method sure sounds good, but how would one make them raise the supersedure queen from larvae from another hive..bah, asking to much again :)..hmm clip the leg, confine her after few days and insert a fresh lain comb from the other hive...maybe..