I had looked at the Dewalt racks other have recommended, but instead opted for this on Amazon. They're angled, but work well for KBs. I just put a towel over each "shelf" and it keeps things from getting scratched up.

If you decide on the Dewalt one, make sure to check Tractor Supply. When I last checked, they were $20-30 cheaper ordering from them.

Edit: Also the reason why I didn't DIY was because lumber and materials are still too expensive right now. The rack I found was well priced.