Hi Peggy. The next phase of my recycling project is the head. I am looking at the Porta Potti 365 unit. The quandry that presents itself is the occasional trip across Lake Ontario to Canada and what exactly constitutes an approved type 3 MSD. I'm not a big fan of the idea of cutting holes in my boat as a year of repairing the PO's foray into power tools was enough to preclude only those holes of absolute necessity. I'm hoping it won't be necessary to reinstall a deck pumpout fitting but I see portable toilets are a no no to our north.