On my 1999 HR Endeavor, my slide is on the driver's side and contains the kitchen. There are 4 rollers that support the underside of the slide. Two of the rollers are located in the basement bins (forward and rear of slide) covered by a black plastic box that's screwed to the ceiling of the bins. There are also 2 rollers inside the coach, in the lower kitchen cabinets beneath the sink on the floor (you might have to remove the drawers to see them. All of those rollers are adjustable and that was how I adjusted the height of mine when it got out of whack. I made several small adjustments and then observed/measured to see if I was close. It might take you up to several hours to make the correct adjustments, but I'd suggest taking your time and making only small adjustments each time.
