Stupid question but need to know...[:-] Im just ordered some mylar to attempt to make my first thrust tube.. I need to know if I make the thrust tube diameter for the fan shroud at 5 1/4" or is this the inside diameter of the dynamax? I cant get to my fan unit without tearing out the ducting,etc to get a accurate measurement.. Do I need to make the thrust tube say 5 1/2" inchs to compensate for the plastic shroud material thickness? Basically, I just need to know the measurement of the outside perimeter of the back end of the dynamax fan shroud.... thank you in advice...

I hope someone understands what measurement I want.. its late (cant think)
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[RaZoR] out..