@kisolre - thank you.
>>Symmetry for the base sketch for easy placement of later features. (I did not knew that would help later)
>>Sketches drag/dropped over the body name to place them inside the body.(I usually used the "map sketch to face" - did not know drag'n'drop was possible)
>>Mapped to base planes for propper attachment. (will try to learn what base-plane is, and why that is better than whatever I did)
>>Screw holes connected to supports with CarbonCopy. (must learn that feature)
thank you, I'll study what you did and learn to do that myself.
This is my first CAD of this type, I were using OpenSCAD for years, but it is not "the right tool" for every project.