pennywise
+1y
the way i see it...
gussets goin down, the bag pushes up on the mounting plate and then the plate pulling on the gussets.
gussets goin up the bag would push the plate, which would push into the gussets, pushing them into the frame.
so i would want to run the gussets goin up but then again if your a competent welder then you should be fine either way.