I just stumbled on this writeup doing while browsing the internet, and figured I'd pass it along:
With a Drill Press:
http://www.colfaxtactical.com/Docs/Justins%20solid%20tutorial.pdf
With a MIlling Machine:
http://www.colfaxtactical.com/Docs/Fire%20Control%20Pocket%20with%20a%20DRO.pdf
Source:
http://www.colfaxtactical.com/Instructions.html
Disclaimer: I didn't write these instructions, thus I take no credit, and cannot confirm the accuracy of the instructions provided.
With a Drill Press:
http://www.colfaxtactical.com/Docs/Justins%20solid%20tutorial.pdf
With a MIlling Machine:
http://www.colfaxtactical.com/Docs/Fire%20Control%20Pocket%20with%20a%20DRO.pdf
Source:
http://www.colfaxtactical.com/Instructions.html
Disclaimer: I didn't write these instructions, thus I take no credit, and cannot confirm the accuracy of the instructions provided.