A few months back or so, I dropped my twin 818’s that I use for portable satellite operation. The silver rails saved my radios but the sacrificial rails did as they should. They saved my radios from direct contact with the pavement when dropped, but one of the rails cracked. My nephew (KJ7MPQ) 3D printed me another set and they are even more robust. The twins will be sporting the new rails once we get back home.