Pool bottom drain cover

I modeled a pool drain which has a flatter profile to it. This allowed for my cleaning robot to have enough clearance when passing above it. It's inner diameter which clamps to the floor is 7 ½ inches and 8 inch being the outer diameter. It's crew holes are spaced 7 inches which suits my needs. I used abs for its weather resistant characteristics and its rigidity which could be overkill. PETG would also work fine for this application. I used 25% but 20 or even 15 should be plenty.