I use this with my dust deputy shop vac setup. Drilling the top for the cyclone was easy and stays out. I used a crap ton of silicone to ensure it was air tight and it's great. Holds its shape and does not buckle under vacuum force. As this fills up, the saw dust will accumulate around the sides and the bottom center is bare. I do not expect this to be capable of filling 75% of the container and still work, but it's so large I'll barely ever had to empty it. Happy with the purchase. I plan to put this and my vac underneath a workbench and this is just barely short enough to fit my setup. I ordered a 2-2.25" silicone elbow reducer so the dust deputy top connection is not as tall. Works great.