yantabulla,
I think you may have misread my post. I perfectly understood your reasoning immediately, thanks. I was not commenting on your method, which must be an assist to getting the job done. It was the idea of multiple moves and umpteen days to do it with grass stuffed in the entrance. The first move may have been the worst, if doing it in a couple or three, because the two colonies appear to be very adjacent.
Shift the one by much more than a hive width and the bees would be very likely to 'find' the other hive (much more activity). That may, or may not, have been a problem. But if 50% or more of the foragers found that 'wrong hive' and were accepted by that hive there could be a bit of a problem with the depleted one at this time of the year.
My original comment was for that reason alone.
Regards, RAB