I always try to weld uphill for the exact same reason. Both penetration and helping keep the puddle clean instead of overrunning imperfections.
Tapatalking in traffic
[soap box]
that sounds like the internets talking
I can lay the same bead in any position, flat / up hill / down hill / upside down.
I think up hill may work better (slower puddle) if your welder is is not up to the task.
When I weld down hill I just crank up the welder and hammer down.
I guess what im saying Mark, is dont be afraid of down hill welding, it has its place..
I give you props for posting your work. Most never fab, much less post their work.
Keep at it. Im loving it.