Don't you dare suggest FreeCAD.

I have a Hope/Hate relationship with FreeCAD. Sometimes I can get it to do something useful and I get hopeful. Then I try to do something simple and ruin the entire design and have to start from scratch and I curse the developers lineage for all of time. I want it to be great, and it is closer than it has ever been. But it isn't a replacement for professional design suites.