Transfer from a Dadant hive to a Langstroth

You mean how to do the rubber banding? That photo really shows it all. This was the post, though:

If I had a nuc on medium Langstroth frames, I would probably just put it into a medium box on the hive. I would then add a deep when the nuc had filled the medium box, and eventually rotate the medium frames out of the hive, if desired.

If we are talking about a medium Dadant, though, the problem is different. I think I would do a cutout for that, although you can put Langstroth boxes on top of Dadants. I am sure some French guys have shown photos of that in the “Coin des Francais” thread. You just need a strip of wood along the edge of the Dadant box, because it is slightly wider than an 8-frame Langstroth.