I upgraded that hose to 1" and like you was hoping to do it without pulling the floor up but it was just a bit too tight and there were a few more zip ties under the floor. Pulling the floor up is easier than I thought. The hard part is simply finding the screws in the carpet. I used an awl and tap/pecked at the carpet until I heard a metallic clink identifying the screw. At least in the LSV there was a screw in each corner which was easy to find but the corner by the drivers seat was offset a bit and took a little bit of hunting to find (but it wasn't under the seat and very easy to get to).