Doors and frames from different shops?

You need the 70s frame.

You have to imagine it like a tongue and groove that slide into each other.

You would rather have a 1mm gap from the wall on one side than that the tongue and groove do not cover each other.

Ok, that's what I thought. Then I will go for the larger frame. Thanks.

Sure, please confirm that again before ordering.

Sure, get in touch with the shop again beforehand. Ask there once more.

Just received the feedback from the online retailer, they also recommend the 70 frame.

Then have fun, how much does a door with a frame cost?

If you are looking for a good cheap alternative, dextüra, I installed it in the granny flat. 2100x860, painted chipboard for about 270 euros. With 4 cross grooves and handle set.