Jeff thanks for the tips on the ear muffs always wondered why I couldn't hear my self think.
anyhow hear is a vid of Mr.Sikkema running his bone stock 7900 with24''bar full skip chain
I needed to pursade the cover on the muffler a bit....... I learned it from that hacker stihltech..... he told me it was safe to do..... even said sharp edge away from saw towards neck..... didn't understaind that part though......