Your response to me is to question my experience yet you ignore everyone else telling you not to do it the way you have
Yes I’ve rebuilt two boats motorcycle fairings and race car body panels and I know you patch both sides and tbh it isn’t patching you take it right back and patch 3-4 times the size of the hole trying to make the as strong as possible with no defined edge
Doing it from one side gives very thin bond
Thinking water pressure will strengthen the repair is just absurd
You can see flexing in the hull if you ever put the boat on the lawn you can see flexing in any hull
As I said why keep justifying not fixing it properly with arguments with others
Just drop the topic and continue on with how you plan to do it