Looks good man.

Could you not give it a fiddel in PS?

I could, but I am pretty much crap at that;)

i'd say add a few cobwebs. could be something as simple as a plane with a cobweb texture thrown on or you could also just really quickly draw up some crap CV curves and loft a really small circle on them.

hows this?:
Small: (can barely be seen)
http://www.joopsontoons.com/sewerclamp_small2.jpg

or bigger:
Bigger

nice job joopson - i like this a lot.

well done mate! :beer: