Broke a bunk a few weeks ago on my Z21 trailer. Was trying to unload it on a low water ramp and while pushing it off the trailer, I slipped and stepped on a bunk and broke it.
Figured it was as good as time as any to replace all the bunk boards with Tuff Bunks. Came out pretty slick, loving them so far and they are about half the price of the other "forever trailer bunks" I've seen.