Exported STL from 360 is hollow and no good for resin printing :(

[Anonymous]

Hi guys

I've been designing some custom detail parts for an ols AIRFIX model kit I'm building, to 3D print using my resin printer.

I'e designed the parts in Fusion 360 using solids and then exported as an stl file.

Unfortunately when I open the stl in my slicing software (Chitubox) and inspect the model, it's been hollowed out...
The walls are soooo thin that I don't even want to try running this on my printer.
It's what I might describe as a "Shell"...? For lack of a better word...

Here's my model in 360

Here it is with a cross section view...

And here it is in my slicer...
You can see all of the fill in the middle has disappeared....
I've made the view very narrow just to make it clear.

I have tried making it a solid using meshmixer but it doesn't seem to be working, also very confusing.
Please help!!! I need the solid parts from the cross section view on 360 to be solid on my STL file so I can print it properly...

I've never had this issue before. Fusion 360 did update prior to me making this model...
Has anything changed that I should be doing something different in Fusion?

Best regards
Thanks

Paul 

[TheCADWhisperer]

I am having trouble understanding the Design Intent. (And none of the sketches are fully defined?)

Is this supposed to be 17 individual bodies, or is it really intended to be two bodies?

Can you Attach your resulting *.stl file here?