As a self trained individual the in's and outs of graving, I will
never claim to know everything. Fancy shaped gravers are meant for
their shape to give definition to your piece. The ''hogging out''
and major metal cutting require a belly so as not to put to much
pressure on the edge and allow it to follow cut rather than lead or
bulldoze the entire mass, it's pretty much a rule of thumb, big cut,
big belly. hope that helps. Ringman