Prepearing a Layens hive for winter

Hi!

I've been a beekeeper since 16 years now, but it's my first season trying and testing a horizontal Layens hive with extra-deep frames.
Since it is quite different with respect to standard Dadant hives I'm used to and I'm starting to prepear my bees for the winter season, I would like to ask more experienced people some advice about what they do on their Layens/horizontal hives before the cold season comes.

I noticed that in the last ten days my Layens bees completely sealed any gap into the hive with propolis: they basically glued all the frames top-bars togheter and the hive top to its main body. If I correctly understand this hive's philosophy, this probably means that I must not disturb the nest anymore, since they are setting it up for winter.

Am I wright? Forgetting something important?

Thank you!

This may help
https://beeculture.com/the-layens-hive/