Maybe I'm crazy. Maybe I ate one too many bowls of granola in my life. But, I want a composting toilet. Nature's head costs $850. I have maybe $5 in coins under a berth cushion. Looks like a simple design. I've seen landlubbing crunchy peace corps types build their own. Can I do it on a boat? Does anyone know anyone that has done it? Will the coast guard put me away once and for all?