Ran across a photo of an old car from the 50s and it just seemed to be perfect for the look I wanted for the mouth for the Nidbots: Olibot's arch-enemies, who only like to blow things up.
Here's what they looked like before...
Here's what they looked like before...
Here's the photo I found...
And here's what they look like now....
Meaner than ever! Maybe the old version can be Nidbot babies...