i noticed the fitting on the top of the box was sticking up a little bit so i pulled it out. on the directions to drill it it says to drill the hole to the bottom of the vein but this one is not. you can clearly see the vein but the hole stops there. in the directions it says to do this so you get the fitting in well enough but do you think that maybe it wont flow enough fluid cause the opening to the fiting would be smaller in my box then in one that was drilled all the way down?? just a thought