Hi 
It went fairly well, they did of course build in the gaps- but not so much and just on 3 frames. That said they unfortunately did not make it through Spring so I can’t say how it would have looked like once the flow started up again.
I am starting again soon and this time will do as MB suggested earlier using some pieces of wood to cover gaps between the two different size hive boxes with the Lang on top and wait for them to build out up into the Lang then remove the bottom box and be left with Lang only & correct frames.