I've seen a post from Realkingcobra about a brace he added to a gc4 to keep the ends from sagging. But I can't find it. At least I think thats who posted it. I've got my 4 torn down and although I have'nt seen any sag in the end slate I figure it would be a good time to take the precaution. If I remember correctly its was just some L channel and some solid screws? Thanks Don