[roystur44]

Add another return flange on the back panel to stiffen the rear.

On the mounting panels for your roller put the flange on the top and mount the panels to the inside of the frame or flip the bend. This will give you 2 more inches of intake.

Consider cutting a 45 deg angle on the front and back of your robot. This will give your wheel clearance when it goes up the ramp. The bottom back/front won't drag on the carpet when the robot goes up at a angle.

Cutting the triangles takes longer than just punching a circle. If you are concerned about time go with a simple hole paterrn instead of the fancy triangles.