I’ve highlighted in yellow the marks from the original (transverse) tank mount. You can see the new mount, even though inline and a much bigger tank, actually comes to the same point leg-room wise (but of course now on either side you are “free and clear” all the way to the nose—lots of room to stuff life jackets and still stretch the legs. I had intended to mount it right on the floor, but by trestle-ing it up a few inches it let me slide it further forward 6-8” (and still leave a healthy gap from the hull itself.) To facilitate storage I built 2” thick foam “walls” on either side of the tank, “floor to ceiling” and all the way to the front, so no chance of gouging the aluminum tank with an errant ski or letting anything stored fall under or behind the tank itself.