I start working on mirroring shapes. OpenCascade supports mirroring as a transform operation and can be done against a point, a line and a plane. I've added (there is no visual tool for this) a point shape to be tested against both: lines and points. Also I think that I can share the code with creating shapes using other transforms (like rotate, translate, etc.) but I still evaluate this.
An annoyance in NaroLinker that it makes you not be able to use too nice your machine was removed: all commands used in build are launched silently.