Ours should be the same or very similar to yours, a 38ks01. I'd expect that the outboard plate the slide arms attach to needs to be repositioned relative to the slide arm. The slide mechanism appears to be very similar to a Newmar, so a Newmar dealer should be able to make the adjustment. I'd expect that it will involve jacking the extended slide up and back into a level position and retightening the arms. This Newmar slide manual
will help you understand how the slides work. There are many similarities between the brands. The other option is to go to an Entegra dealer as it is the current name of the manufacturer. Many parts are the same & they are helpful answering questions on the older units.