My slide box on kitchen side is hollow bottom with aluminum stringers I think. I know there are some kind of stringers above a very thin bottom luan type plywood. If lifting on this type, be sure to lift on those stringers. If the slide is solid wood or osb bottom, not as critical I would think. I would just try to spread the load out a little. I had no problems lifting the kitchen slide to test fit or “practice” installing uhmw strips for install later on the run. That’s a story for another time. After that Exercise, I bumped the slide back about 1/2”. It was too far forward. So much so that the angle was too steep on the wiper seals and they would never flip on the front, I always had to stop the slide half way in or out and flip them with my fingers (no window frames on the kitchen slide to initiate flipping the seals.) Most times they would partially flip and then take a “set” like that and not seal the next time I ran them out. Anyways, it works now. I moved it about an 1/8” at a push then Had to wrap the inner tubes forward with a rubber mallet because I couldn’t overcome the coefficient of friction (LOL) at the vertical adjustment bolt. I did that until I got it where I wanted it. Next time I would try lifting a little further away from the wear bar to take more weight off the adjustment plates. That kitchen slide is heavy. Going back to the original issue here of the gear pack partially engaging the rack, moving the slide back or forth doesn’t change that. After the slide is positioned where you want it, you center up the inner and outer tubes and tighten up the bolts. If the gear isn’t in the middle of the gear pack, it might need shimming I’m guessing.
