The problem with a prop that has been recast from each previous model every time it goes through an upgrade is that there is shrinkage from the original size. For example, I bought a first generation ST3 klingon communicator at the 20th aniversary ST convention. Years later I saw the same prop from the same maker with upgrades and it had lost about 3/8 of an inch in lenth. The most shrunken tell tale part was the norelco rotohead dial.