Ok, so what I have discovered in approximately 10 hours of attempting to make GUI editor work: it works best, at least from my end, on resolutions which are not custom/widescreen, so only with the original resolutions in the game. YES I am sure there are workarounds, but to me it's a 50-50 if the game will run or not, so I really don't want another component on an already unstable pile . I use the flawless widescreen to generate a higher resolution, and quite literally the GUI editor would work once, then subsequent starts of the game wouldn't work, or would nudge the HUD a bit, it was really weird so I can't really work with it since it gives me varying results.
I've settled on a solution, however, which permanently locks stuff and I don't have to go through 69 processes to get what I want and that is to manually adjust the display size through Flawless Widescreen, under settings > configuration > display detection to set HUD width and height to be super small, like 80x60 with an X position of 100 or so. Probably gonna shrink it further. This SHOVES everything in the corners leaving a nice big empty space I can trim nicely in the video editor. This also allows me to see the minimum buttons needed, and play the game to get precise actions that I want, while having a clean surface to work with.