Hello beautiful SW Forum Community,

I've been searching the forum to see if there's any easier ways of filling in a cavity - one of them was this thread but really didn't help since I am not able to "subtract" features such as loft, revolve, etc.

I made the object in the picture to explain my problem.

It's a sphere ball with supports inside.

Inside, as you can see, has hollow-pipe-scaffold with fittings.

What are some ways I can fill that cavity (excluding the space inside the pipe)?