Go to the 16ga Society forum site, there was a thread on there a few months ago on mfg roll crimping heads.

Thanks for the reply and the pointer. Would it be possible to give a link to this site as I have found it difficult to locate this item.
Thanks
Fortune
PS Goat I have replied to pm and look forward to seeing the pics
Thanks

Not sure how to post a link on this site, but search 16ga Society, should get you there. On home page click on "Gun Talk". I will work on putting up link.

OK. I found it. Quite interesting. That thread almost mirrors this one. And they've gone through the same problems and ideas that I have had with the grinding of small tool bits and the re-idea of making it in two or more bits and then the internal shaping of the tool.