I'm rebuilding my 16 feet cat. I have removed a wooden plateau that was also the mast support (it was adjusted bellow the alluminium tube and also had a role as support). I will replace the wooden plateau with a fabric trampoline.

Most small cats (Tornado, Hobby cats) have mast supports bellow the tube that connects the floats.
My mast is put on a 4 inch (diameter) allumnium tube with internal tube reinforcement (a tube inside a tube where the mast is).

Do I also need the mast support?

My cat:


Tornado (see the arrow pointing the mast supoort)