Gavin Brunton Angle Jig For the McNaughton Center Saver System

Check out my YouTube video on the jig:
https://www.youtube.com/watch?v=QViwRjm0dYc
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This is my interpretation of the jig designed by Gavin Brunton for setting up the McNaughton Center Caver Coring Jig.

http://www.kelton.co.nz/McNaughton%20Center%20Saver.html

The coring system is fantastic, but takes a lot of practice to get the optimal results. Gavin Brunton designed a jig and accompanying spreadsheet where you enter the bowl blank diameter and depth