I am living in an old single axle (dually) class A RV. i want very much to build a biomass stove in here next spring. I am thinking either use it for a couch or a bed. It seems obvious the the heaviest part of the stove works should be over the rear axles but am concerned about total weight using clay. I realize lightening it up may well make it less efficient, but would like knowlegeable feed back on this. I am also wondering about incorporating a rocket stove type water heater into this project.