I love nothing more than rooting through old sporting periodicals just reading this and reading that. However, the discussion of Lefever dolls heads and other forms of extension ribs in pre and just post twentieth century periodicals has defeated my speed reading and comprehension skills. There is just too much to digest. I have it all marked off so that some day I can get it copied and into researchable form. It is so much fun to read about guns that contributors thought would wear out in a few hundred rounds that we are still shooting with heavy loads today. Personally, I don't think a doll's head is worth a hoot, except for appearance or as an engineering exercise. One of my most heavily used graded Parkers doesn't have one. Late Trojan Grade Parkers don't have one and are doing well, so far. Parker single barrels don't have one. I think Tom Skeuse could have saved a bunch of money on the Repros if he had made them as non ejector guns without extension ribs.