Adele M has a sort of platform tabbed into the after section of the starboard cockpit locker. It even has formed blocks and a tie down strap for those old round cornered evinrude tanks. I don't use it cause I figure fumes can easily get down into the cabin from there, but does anyone use such a thing, or even have one? I myself use a three gallon nissan poly tank on the port laz floor. I set it on an old car floor mat, and it stays put pretty well. I keep a new 5 gallon poly reserve container down in the forward section of the stbd cockpit locker, under the sail bags so it stays put. Less weight in the stern that way. Ya need to keep that laz cutout from digging in while underway.....