As summer is approaching I was thinking of moving the gpu farther from each other and run 6GPUs in a 8GPU case. Any suggestions on longer mining open case. Thanks
DIY is the way to go so you can customize everything to your exact liking. There are lots of guides and videos out there on how to DIY your own mining rig rack.
However, if you simply want to buy one, i would recommend Spotswood. Google their website. They sell quality racks that look good.