Quote Originally Posted by JohnHaine View Post
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Here's a photo of the tool with the number on the shank, hopefully you can get one from JB. If it would help I could post a photo of the modified tap but it's not very interesting, just an M8 tap with all the teeth ground off except one row. To find Richard's website to get the wizard look for Chestnut Pens.
It would be interesting to see the tap. Here is the link :- http://www.chestnutpens.co.uk/misc/downloads.htmlClick image for larger version.  Name: Thread mill.JPG  Views: 273  Size: 123.4 KB  ID: 24095