I definitely used it as per instructions. I also used screws every 3"
to hold stringers to the ply with the Gorilla Glue. When I took the
boat apart, I was easily able to pry them apart after removing the
screws. There is no doubt there was sufficient clamping force.
In my furniture repairs, I also followed the directions and clamped
things well and the Gorilla Glue failed. I do not believe I am an
idiot so I tend to think that if I followed the directions and was
careful and it did not work, there may be a problem. It seems that
epoxy is more firgiving.