how is the leak fixing going?
I have a leaky 265 also - small leak in middle of the back wall where the side meets the bottom.
I'm going to cut the silicon off the inside of the tank but not take the panes apart (keeping any silicon between the panes in place). Then I'll get 12mm glass cut to fit along the wall (so 83"xsay 2" by 12mm) and silicon it to the bottom and to the sides - hopefully making a new seal between the bottom plate and the sides - figured this will give an extra right along half inch of hold along the back wall. Because the tank is empty, I'll do this right along the perimeter of the tank. Hopefully will be water tight and stronger than before. Interestingly, the side joins already have a half by 1" brace which runs up and down the corners doing the very same thing.
Much easier than taking the entire tank apart.