Dale88fan,
I initially had the same concerns about a kitchen slide, but after owning the 2900MK for a year, my fears were unfounded. The slide doesn't out move that far ( not as deep as the main slide). There is no water or plumbing on the slide, so no worries there, the only thing besides electrical is the propane that connects to the slide. The propane hose is the flex type and is in a well designed flex imbilical that in and out with with the slide. My only minor issue with the kitchen slide with a fridge is venting. Normally when a fridge is mounted in a fix outside wall, it is vented out of the roof. With the fridge mounted in a slide, the heat from the fridge has to be vented horizontally out of the wall of the slide. Since side venting isn't as efficient in venting convectional heat flow, an electric fan is used to vent the heat out of the back of the fridge. On moderately warm and hot day, the fan is on all the time and even then the fridge doesn't seem to perform quite as well as a top vented fridge? Overall, the 2900 MK with the center kitchen slide is an awesome floorplan and I would not hesitate to buy another kitchen slide model in the future.