I am fitting a new toilet back into the boat where the old one was before, the holes don't line up though.
You can see from the photos that the old toilet somehow bolted to the level fibreglass lining. I am just unsure what type of bolt etc I should use to fasten the toilet base. I thought maybe a big self tapping bolt but I'm not sure the glass is thick enough, and I need to be careful that the bolt does not protrude into the hull ;)