How to make a joint of the following objects?

[Anonymous]

I have such a model where walls of the cylinder are screwed into the base.

On the top of each wall there is a part of a complete thread that was obtained by intersecting that thread and walls. Above them I have a ring that I want to be screwed around those walls. There is an inner cut in the ring:

and the whole picture is as follows

Now, the question is how to make proper joints for all wall threads in the bottom and upper threads with the ring?

I have tried different combinations as well as first making a joint between walls and bottom, and then adding a top joint but Fusion takes only one wall as a component not all (each wall is a separate component). What should I do? Thanks in advance.

[etfrench]

You need to define what you mean by proper joints

You can use an offset in a joint between the base and ring with the offset equal to the height of the walls.

[TrippyLighting]

Usual question, can you share your model ?