Thanks for the info, next time out I will use the buffer and spring I got with the barrel. If it isn't broken....don't fix it. I will continue to research gas port hole sizes. Good info in 'Black Rifle' vol 1 & 2, getting things to work right is 70% of the fun anyhow as I have to drive 105 miles to do a test fire with my five round magazine.
Be safe, shoot straight
WetCoastBob