Ken,
Correct. I meant to write non-chargeable. While there were models in the past in which a concaved handle was either unavailable or chargeable (Stanaback Special for one) the Model #12's were never one of those exceptions. To clarify I have edited the post to read "no additional charge". Thanks.
Best, Capt. Chris
PS: Concaved & commando are now available of my special at "N/C" also...CCS