I bought a 160lb weight set that includes a 6 foot barbell and 2 adjustable dumbells. I don't have a weight bench as yet cause I'm still lookin gfor the right bench for me. I read ppl sometimes complain about how the barbel rests on the uprights and how its too narrow or too wide. What should the minimum/maximum width or distance be for my 6 foot barbell to rest on it evenly like it should? Thanks alot in adavnce.