The vanity slide is driven by scissor-like hydraulic rams--if you open the rear closet door and look behind the wood trim on the vanity slide, you will see two adjustable bolts. If the metal frame of the slide contracts these bolts, your slide is fully extended. Given this scissor design, the wood trim on your vanity will remain several inches away from the wall. At best the vanity only opens 12" or so--maybe 14".
2003 Alpine 40' MDTS
New Braunfels, Texas