Currently, when you create a visibility parameter for Extrusion 1, and join Extrusion 1 to Extrusion 2, Extrusion 2 will be forced to inherit the visibility parameter as long as the join remains.
This prevents us from creating modularity with the appropriate amount of modeled information, and would force me to make 4 extrusions, or two separate families. Both of these are workarounds, but not solutions.
Please allow us to independently control visibility of joined elements.
Thanks.
M