I want to modify an STL file using FreeCAD 26.3.

Google tells me to import the STL, use Create Shape from Mesh in the Part workbench, then Convert to Solid.

When I do this it looks like I still have a mesh.

Google then tells me to select the Solid and create a body from it. This is the result:

I'd like to work on this body using faces, edges, etc. in Part Design. How do I convert it to a "real" body for use in Part Design ?

Is there another way to convert a mesh into a body in Part Design ?

Thanks

Update

After lots of mucking around I captured an image of the part and redrew it in sketch and padded it to build the body.

I was able to convert the STL to a solid and then a body but there was no easy way to work with it in a parametric manner. It was easier to just sketch it out and build it up from scratch.

I am in the process of learning FreeCAD with very minimal previous CAD experience. I have been playing around with creating parts and joining them in the Assembly bench and am stuck trying to figure out how to change the dimensions of a part after joining two parts together.

If part A is a long block and part B is a small feature attached using a fixed joint at one end of part A. How can I adjust the length of part A while part B stays attached to the face of the now shortened part A?

Any help greatly appreciated!

help plz. Guys.