Update...not so bright...

[macojoe]

Well you already have the stringers there if you want to rebuild them.
You need to cut the tops off dig all the old wood out then replace and re-glass.

But before you do that, go around with a drill and drill some 1/4 holes and see were there is no stringer left, it might not be as bad as you think??

drill hole if you get dirt, its Junk, black wood is wet wood, is you get clean looking wood you good to go.

center bulk heads have been moved to make room for bigger gas tanks. You need no measurements from wellcraft you have all right there ;)