Thanks for the reply, Jackson. I am using Vue 6 Esprit - I cannot find anywhere where it defines units - I think that is a limitation of esprit. I've decided to upgrade to the Infinite version (early Christmas present). Besides some extras, it has the option to use imperial units, and to import SU files directly. The problem I had was with some trees purchased through cornucopia3d. They were no where near being close to what they should have been. My logical brain just doesn't understand creating something so far out of scale (and they were SolidGrowth trees, so they had to have used the same program to create them).