HI, Longarc I work alot w/a plumber companies must of the work is in position (5g) or prefab in the rig, what I do is; I weld 2 section at a time turned it w/ the chain clam, whent every 2 sections are welded then weld it together a section of 2 sections and so on, usudly doing 2 or3 welds in fixed positon. the way I don,t have any leaks is because I used e6010 rod up hill, about 85 amps and e7018 3/32 up hill hot aroun 85 amps for fill and cap, and don'n worry about the presure test usully the welder don't have to be arount whent testing, thats the costumer (on this case plumbers) job.