I bed both ends with dev-con 10-110 slightly snug the screws as to not bend or bind the rail let it harden a couple days and remove it to check that it has a lot of mating surface then when you install it and torque to spec the clamp load will be stronger than just making contact here and there. Just they way I do it and doesn't mean it is the best and only.good luck and make it fun or it will turn into work