Cool masks man! Yeah I've done the pep thing too in the past, but it was more because I was going for a certain look. Pepakura is still a very cool thing considering back in Middle School when I started making props/etc. NONE of the abundance of info we have today was avail... But I digress... Thanks! I'm sure you'd pick up Rhino well. The UI is a bit different than SW & you have to think differently because it's not: sketch,define,build part,mate assembly... it's more like: pull this shape, add some curves, make a surface, split this, boolean that, transform this, etc.