The Z71 plastic is slippery despite the aggressive pattern. I was considering to weld some sort of grating on top after removing the cracked plastic, but that doesn't help back passengers who usually end up stepping on the rounded steel tube and slipping! IMO the Z71 boards were made for 'style' and are terrible in every other way. I'm a fan of the standard running boards. I have extra Z71 running board parts in the backyard still, but the plastic is cracked too. If you want spare brackets/tube/endcaps, they're yours! (Otherwise I am putting them out for curbside trash pickup)