Little tip when spacing out and tacking parts that are repeatedly spaced the same distance apart, use offcuts as spacers to line things up and keep consistent spacing. Maybe that’s something pretty obvious but it saves a lot of time especially trying to get things lined up when there’s no one to hold something in place while you get a tack on it. You can see in this vid I have a spacer determining the gap and then spacers tacked under that to hold it at the right height and a spacer to sit under the tube to hold it flush. Either have a two part spacer you can break down to remove post weld or if you can take it out before hand so it doesn’t get jammed in there.
Also a little manual pulse with the thumb wheel on this vertical up, helps welding thinner material to thinker material. The lower side of the “pulse” Amps would be enough to climb up but then I give it a blast as I dab filler just to really push it in there.