yep Mike .
try thinking of the graver as a wood chisel or gouge . The bevel of the chisel being the heel .
Without the bevel the chisel will dive into the wood . Flitp it over with the bevel down and it will ride along at depth or rise out of the wood .
With softer materials like Brass or Aluminum , I use just a tad larger heel then if im working on a harder steel . I find that to help me control the depth of the graver more easily