I don't really know much about building anything so I was trying to keep this as simple as possible (2x4s and OSB, wood glue and screws). I'm worried about the highlighted legs bowing.
This is for a grow box I wanted to build. The top part is a hood, and the front will be a hinged door. I'm trying to avoid another horizontal support across the two highlighted legs because I want to be able to have a completely open space from the front and top.
The hood would have an additional 10lb load from hanging lights. The inner table will hold a tote with up to 8 gallons of water.