The attachment editor in FreeCAD is just terrible. Whenever you try to attach a sketch, the first thing you have to do is rotate it into the proper orientation.

The attachment editor in FreeCAD is just terrible. Whenever you try to attach a sketch, the first thing you have to do is rotate it into the proper orientation. There is also no visual preview of any of the operations and 99% of the action is manually entering numbers into the left pane instead of using visual tools to drag an extrusion, for example.