Looking for a recommendation for further design software.

[Sebastian Finke]

I'd stay away from Cubify Design. You're locked into their file format when saving except for outputting STL files or dwg. I find either DesignSpark or ViaCad Pro the two best options for either free or low cost CAD software.

But that goes for most software as export modules need to be licensed. And while it can only save as native and export stl it import step, iges and sat (and solidworks files, if I'm not mistaken).

Plus it is fully parametric... for $50. That alone puts it heads and shoulders above the 'free brigade'.