how do I make this a solid?

[curtplattdds]

I have a group of objects that I would like to combine to make solid with no hollow cavity inside.  As a crude example see below:

Thank you so much!

 

[etfrench]

Patch and Boundary Fill are your friends😀

[TheCADWhisperer]

@curtplattdds 

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply if your can’t figure out your new friends.

[curtplattdds]

Please forgive the absolute beginner model.  I am having so much fun though!  I need to somehow convert this to a .obj file, split it in 4 sections so I can 3d print it at home.  I think I understand the boundary fill but it is really hard to find all the open areas in the model.

[curtplattdds]

I have one or two people who tried to convert it in a mesh program and lost all the details...I think it has to be done in Fusion 360 somehow.