I have a mother board that is 20.2 inches long by 8.8 inches wide. I have been unable to find a computer case chassis big enough to support it. So i tried getting a crypto mining rack and putting the board on there. It is still too small. Is there any advice I could get on a suitable method for securing this thing. Its an ASRock H510 Pro. I got it primarily because it would support 6 gpu's.