I'm considering doing what most end up doing, expanding my pond, a little wider and definately deeper. I put in high areas that were useless and etc... Anyone try overlapping and bonding old to new with adhesives and I think some gravel at the deep spot? I have Sooo many large stones around parts of the existing, it hurts my back just thinking of moving them. The thought was to work just from two sides, the sides with the slate of course.