Thanks a lot for all the very helpful hints and thoughts.
I'll check the validity of the SW 2007 license, and will also have a look at the mentioned alternatives.
I use CAD to make patent drawings, i.e. figures to illustrate inventions in patent applications.
For this I need basic drawing functions, no data management and no integration with maufacturing (CAM) etc.
I want to switch to a 3D CAD and decided to go with Solidworks.
I could buy a used...