In order for this item to properly work, insert the sliding doors into the groove of the van's roof, and then glue the bottom piece with grooves in it. Make sure both grooves are facing the same way! Otherwise you won't be able to move the door! (order here - https://www.shapeways.com/product/RASKPP325/wooden-railway-van-sliding-doors-tracks?optionId=171327374&li=shops
). This way the door will fit snug and tight, and it's not going anywhere. This was originally made as a mail van by request of catariss89
, but it can really be used for almost anything really. This was modeled after the Wooden Railway Thomas vans that played sound effects when the door was opened and closed.