Looks Pretty sick. Make sure you get all the holes. If you don't...You're Screwed. I hear they are pretty aggresive and will chase after you for a while if you threaten them. I like the tailpipe idea. That's a really good idea.
BTW, those are deffinatly not Cicada Killers. We have cicada killers all over camp. They are fun to watch; and like the one guy said they are completely harmless. The holes do look like Cicada Killer holes though.