Halloween 13.02

My plans for my Portal 2 costume have hit a bit of a snag - all the Portal guns sold out in 30 minutes...  I am now left with making it myself.  There are a variety of way to go about it.  I doubt I will try to include any blue or orange light effects, but the general structure should be doable.  This is a good do-it-yourself guide.

I am familiar with the green foam that is used for the white shell, and it seems a reasonable thing to use.  Finding the proper tubing and such will be more challenging.  At any rate, that's the next big project on the horizon.  I will post pictures as it comes along...