Just a word of warning regarding the
inspection ports, and plastic
tanks in general.
When you fill them up, they will expand and swell. Mine actually
lift off the wooden boards under the seat
cushions below which they lie.
Also, the
inspection ports will seep
water unless you seal them very well. There has been much discussion of this on the C36 forum; all kinds of solutions have been tried but the only 100% effective one has been to permanently seal them shut with 5200. Personally I don't mind a little fresh
water in the
bilge, but some people do.