Got me this acrylic,"forever stem", from Vermont Freehand.com. May not be mod per se, to me it's a major improvement to the stock, molded plastic, cheap stems found on all, (Except new line of acrylic stemmed MM's), Missouri Meerschaums.I chose the longest stem, with the widest mouthpiece. Made to fit diameter of mortise, (That's a MM general it's attached to)