.scad file provided for editing. If you only want to change the text, all you need to do is change the 2nd line of the .scad file
text="Makerbot"
and recompile.

(you can't see the text in the thumbnail, cause it's on the other side. Use 'thingiview' to see the other side)

You will need the 'Write.scad' package from here
http://www.thingiverse.com/thing:16193