My WC holding tank needs replacing as its got a small leak.Its a bag type. I have another bag which came with the boat when I purchaed it a few weeks ago. The only thing is that the new bag has only one moulded in connection. Does anyone know if I can add otherconnections sucessfully?Having said all that, I would much prefere to put a rigid one in there, does anyone know the maximum size I can put in through the v-berth access hatch?thanks