To prevent “bridging” when routing wires harness on internal bends include an “S” bend.  The “S” bend will allow the harness to route on an internal corner with no “bridging”. In addition the “S” bend will allow for variations in harness length without causing “bridging” or other unintended interference

Sometimes a design demands a “zero” or very small radius inside corner. This can be completed at minimal cost by designing a “pilot” hole.  The rest of the machining can still be completed with large high speed cutting tools.

When designing a part for laser or waterjet cutting minimize “Pierces”. A pierce is where the cutting beam/jet must drill through the material. Each pieces take the same amount of time as cutting a several cm of length. In addition piercing material can damage the surface finish or affect the mechanical properties.