Ok I'm getting completely confused. You can scale up but you can't scale down?
My weapons gauge is somehow being clipped ("Promethus ") instead of ("Promethus S")
If canvas width == display size width, everything looks ok, just goes beyond the hud mesh
If canvas width < display size width, the gauge gets stretched out
if canvas width > display size width, the gauge gets cropped out too soon ("Prom") and the rest is black. There doesn't seem to be any scaling on the gauge and the cropping rapidly increases as the difference becomes bigger (20 point difference completely hides the gauge)
If I leave canvas out completely, display size is irrelevant (you can throw huge numbers in there and it looks the same)
BTW this is 3.7 RC 1 build.