My squirrel cage blower is unbalanced or something, it gets really loud at times and makes you want to duck for cover.
I did a test by marking a spot and I found the heavy side/unbalanced part.
I read somewhere you can put duct tape on the light side to balance it out but it there is no room to work with around the housing of the cage.

Do I need to take it somewhere or should I just run it till it really does blow up?