Greetings,brethern
http://www.portal.gmx.net/de/themen/wissen/bildergalerien/10722238,page=1.0.html
I found this picture today that I wanted to share. While it does not have thorns or blades or anything, I think it is a good inspiration for a Ripsaw Scuttler.
Of course, a scuttler will be larger then this and perhaps with a different "lack-to-body-ratio". But I found this pic rather helpfull.

