Here's one of R2D2 I did a couple of years ago and forgot to post.  Enjoy ;)

Note:  I've added a V2 of R2D2, as I'd just noticed that there was some detail on R2's head that didn't look like it was supported properly and might be prone to sagging.

Tip:  The tab on the bottom is designed for using something such as Sticky Tack (a reusable soft adhesive putty), to keep your artwork secure in even the strongest gale force winds :D

I've also made the positioning of the tab so that you can easily remove it during your slicing process, if you'd like to place the artwork on a wall.