DIED-
I agree with your thoughts and will discuss them with the engineer that is going to manage the repair.
Did you think about bentonite at all? I spoke with the guys at Texas Sodium Bentonite and they stayed short of giving me a guarantee. Their response was, "we will not leave you hanging if it continues to leak". With all the people in doubt about bentonite you would think they would pick someone's pond and do a free repair and post the pictures and testimonials. If they did one free pond a year that would be better than any other form of advertising. What do I know, I spent 35 years in marketing.
1234- I apologize if I'm hijacking your thread.
Tony