MAX file has history in tact so level of detail is adjustable. MAX geometry is instanced to quickly change level of detail. MAX file has dummy object that when rotated, the door will open. To animate the pins in the MAX file, simply select one of the pins and animate the BEVEL modifier.. then all similar pins will open and close. 3DS file has 99936 polygons...search for 'dummy open' to rotate the door open. Also comes with the lathe texture bump map.