REFLECTOR: Leak Detector Strakes

[velocityxlfg]

Any one use one of these leak detectors to find leaks in there strakes?
I was thinking of putting a little gas in the tank then pressurizing it with 
a Balloon
and using this to sniff around for leaks. I have a very slow leak!

http://www.thehomemarketplace.com/HomeMarketPlace/Shopping/ProductDetail.aspx?CID=For+Your+Home&SCID=Hardware+%26+Tools&ProductID=0000152544&SourceCode=50508000001&Affid=1