Spiral Barley Twist

I just finished my first test run making a hollow spiral barley twist post on the recoil, it is made from a 4″x4″ post. I bought the barley twist bit from http://www.magnate.net/index.cfm?eve…roup&theID=240

Total machine time = 17 minutes

What I think is really amazing, I machined this with G-Code I wrote myself