I got my 3 stage Aquasana water filter for Xmas 2015. I didn't really have anywhere to mount it under the sink because my cabinet is totally messed up. So I needed to not only build something that I could screw the Aquasana to, I had to at the same time create something that would brace and rebuild the structure of the cabinet.
The issue seems to stem from the fact that whoever put my cabinet together just sawed a cabinet it half so the stove could fit. So it doesn't even have one side, the white you see there is the stove. Like a house that lived through a tornado, and one wall is gone and you can see inside the house. When I moved in I cobbled together some junk boards and screws and it was pretty crappy. So I tore all that out and took a million measurements and fabricated this gem at work the next day. The top right side reaches up to where there is a fake drawer that actually pops open, maybe so you can use it as a garbage shoot. I knew I'd only be able to get one screw into that but I also knew that would be all I needed. I even cut it a bit short so I'd have to shove the cabinet face back a bit and let the brace hold it there forever. It all actually worked really well.
You can see that there are numerous layers of plywood in the right places, I wanted to be able to have my screws for mounting the water filter kit be thick enough to hold screws and this is pretty cheap board.
