That's great thanks. Ive just screwed out a floor panel in the middle of the boat. Because its a springer we have a V hull and the limber holes seem to be on the highest points (sides) so presumably if any water comes towards the stern then the ones closer to the bow must be absolutely full? Also there seems to be two separate left and right parts that have different water levels. Do you know what is the relationship between those two seemlingly different resevoirs because right at the very front of the boat where the tank is and where i think there is the leak, it is just one area covering the width of the boat. Sorry for probably basic questions ive just never got stuck in on hull stuff before and i havent got any plans for my springer thanks a lot