
Yes, there are several nested containers, the root of all is a margin container, and I can move this around and the changes can stay. However, I have tried changing pretty much every parameter of the margin container, and there doesn't seem to be any way to bring the bars closer together. I'm getting the impression that this 4-pixel-wide gap between every VBoxContainer item is just built-in.
It's just that, strangely, when I tried putting together items in an HBoxContainer (rather than VBox-), there wasn't any gap and the items were completely flush with each other.
I will probably get around this problem for now by manually placing the HUD elements without the use of any containers, but I'm hoping for an actual solution. I'm sure I must have overlooked something obvious but I just can't seem to find it right now.
(Also, it seems like the URL broke because of the period at the end, sorry).