I too recently finished my 6G pipe work. That root pass looks pretty good... perhaps a little thick in some places. The cover pass could use some work... mostly keeping your lines straight.
If you haven't done so already, try using a fixed shade gold lens. I was using a 3M Speedglas AD shield, and switched to a fixed shield with a 4x5 shade 10 lens, and the difference was incredible. My ability to keep my stringers running straight and consistent was greatly improved.