[bncinwv]

The reason the mattress hangs over a "little" is so that the mattress can cushion the impact with the drawers when the slides are retracted. In case you do not realize it, when your slides are retracted your bed pushes the drawers back beneath the wardrobe closet. By putting a shorter mattress on the existing bed platform, the platform itself will be what is pushing the drawers back which will most likely damage or scar the contact point with the drawers. Therefore, if you put the shorter mattress on, you must put some sort of cushion on the end of the bed platform or shorten the bed platform to allow the shorter mattress to cushion the impact point. Clear as mud???
Bingo