Dave you're a great help!!! in the short time I have been on this forum you have helped me out a bunch!!! and it is greatly appreciated!!! I've been around for 60yrs, I have a great knowledge of many things but I'm just getting started on building my own rifles, I've been shooting since I was 4/5yrs old, growing up in a military family, I've been smithing on guns since my 20's, most of my experience on working on guns has come from the air gun community. look me up on the GTA Mark 611,