Fusion of 2 .STL parts in one solid part .STL

Job ID: 37142314

Budget: €8 – €30 EUR

I'm looking for an experienced designer who can merge two .STL parts into one solid part (just a single shell, not two shells).

The 3D manufacturer I chose to 3D print that part answered me how you can see in the screenshot I have attached here.

I tried to solve it with freeCAD but it gives me the error: "the resulting shape is not valid". Maybe you need to manually fix something to avoid getting this error.

The cast part will not require any post processing, the only thing is that the 3D manufacturer will see a "unique shell" and accept the final STL file.

MY PROPOSAL: the first freelancer that will send by chat the right result will be rewarded. I have a budget of 10 EUR. That's it!
Related categories: CAD/CAM 3D Rendering Solidworks 3D Modelling 3D Design