Well since I was going to buy the Shiva drivers from Adire I figured I should go ahead and purchase their vent kit and just use their plans also. That was a mistake. First of all their cut list for their '142.5L Vented Box' is wrong. So if you follow the plans exactly like I did, you are going to have problems. So after purchasing more MDF, which is not expensive, but for me a major hassle. While waiting on the vents and Shivas, I decided I would cut out all of the holes in the braces, and for the vents and drivers. That was mistake number two. The vent hole size of 3.38" radius is wrong. I actually erred on the small size and now that I have the vents, I see that my holes are too big! The flange on the vent is large enough that the vent will not fall through; however, I can not screw it down because the screw holes are right on the edge. Does anyone have any ideas as to how I could attach these vents, besides buying more MDF?