Maybe a different subject buuttt. I have never seen a Snelgrove board, but I assume it is a double screen, with screens about 1/8 inch apart. My question is, "What would be the results if you used a single screen between two colonies stacked, 1. would there be significant fighting in a hive combine situation. 2. could this be used in stacked nukes. 3. would the queens fight 4. If one colony was queenless in a combine would the queenless colony raise a new queen if the SB was left in. 4. why don't the bees in a two queen hive fight as some workers carry one queen pheromone scent and others carry another scent. Would the above answers be the same with window screen as with 1/8" hardware screen