you are a pretty good welder,,[just looked at two,,up 7018 and overhead 6011 believe it was],,,,can't do any better up than that with 7018,,,,the overhead,,,to much gap,,and or not enough land,,etc,,,,you got to experiment with these gaps and such,,,,I always used about 1/16 gap and 1/16 land,,thats in inches,,,,cause I was a down hill welder,,down hill you don't gap it very wide,,you butt that rod up against bevel and push it in,[rod tip is actually touching steel,,or there abouts],,,what I'm saying to you is,,,vary your gap,,,experiment,,,,vary your land,,experiment,,,once you put root in,,you are done on backside,,its got to be 100 percent,,,if you take plates down and grind off root stick through,[penatration],,than you shouldn't have to grind off much more than flush to get to plain shiny metal,,if you can't do that,,than you need to change your set up,,,whip and pause will leave you with voids in root sometimes,,not acceptable to code,,,,thingy