Hey Sam,
I think the icons do help convey the idea, maybe make them a bit less bold, and a bit less rounded. I’d maybe take a screenshot of the front of the sheet metal frame, take it into illustrator, and build the icons with line weight to match the sheet thickness.
I do like the image you omitted, and agree it is a bit busy… but I think it conveys the idea better than having two different images from different angles, so personally, I would include it. Alternately, you could maybe show each function in a different image, but keep the same angle between the two?
What gauge of sheet metal are you using? My first impression was that it actually looked about right for stability, since there’s really not much weight on it, though the bend radius for the rails is probably a bit tight.