Flatbeds are not all the same. Some are steel , some aluminum , some smooth , some diamond plate .
Mine happens to be diamond plate aluminum . My TC has 3/4" x 1-1/2" wood slates under the floor that run front to back @ 12" oc . I have found that the combination of the diamond plate and wood slates makes it stick like glue , once on it never moves .
Because I have doors that enclose the sides it is very important to have the camper centered . I use to run back and forth measuring as I was lowering it to accomplish this , a real pain . So I decided to finally try something else . Once had it centered perfectly I placed a 6' 2x4 on each side , drill 3 holes in each and through the diamond plate and put 3" carriage bolts in , no nuts . Works like a stop on a woodworking bench . This seems to work the best so far . I am never far off when backing in anyway as I only have an inch or so clearance on each side .
I'm not sure of the particulars of your setup , maybe this will help and maybe it won't . Good luck
