Could some of you here that complain about Hulk being rough be more specific? Was the entire ride rough or was one part more rough than the other? Were you sitting in the front, middle or rear? Was it side to side rough or bumpy up and down rough?
I cannot imagine the rails being rough as they are smoothed by the run of the coaster each day. I cannot imagine that a few of the rails have come loose from the main green support as the ride would be closed.
FUN FACT: Next time you get on DC and while you are getting buckled in, look up above at where each car is attached. You will see little colored drips of what appear like wax on each and every bolt and nut (not wax I suspect but it is probably more like a hard plastic of some kind) . Those are inspected every night, if not each week for cracks in the dripped seal. They are much like the wax seal on an envelope. If you see a crack in one of those seals... be scared... be very very scared.
Anyway, details on the roughness would be appreciated.