I'm tired of breaking cutters, so this is more a suggestion to Vetric than a question.

When you do a finish cut on an object and you have a large shelf drop off that runs parallel with your cut, you will break your cutter as it will follow the low path while there is still overhang on the upper face. There are a couple of work arounds such as change the raster angle, import into Vcarve and do a 2d "go around" of the ledge, or hack the gcode so the cutter clears the upper edge.... Each have there own problems associated with doing so.

In wood you can get away with poor tool paths, but unfortunately steel has no forgiveness, I'm sure it's not just 3dcut but all Vetric 3d rasters that are blind; and given my cut 3d was compiled in 2007 some improved intelligence in the toolpaths wouldn't go astray!