[quote=Edchris177][quote]do the repair about 2" at a time[/quote]
You're over thinking it.
Decades ago, I did a semester of welding, I understand the idea of tacking things together, & not overheating & distorting metal. I have an AC/DC arc welder in the garage at my lake house, great for building/fixing dock frames & other stuff, but we are not dealing with metal here.
In this case nothing will distort, BUT, you will end up with a weaker fix. Unlike welding, If you go at it a few inches at a time it will be very difficult to bond each 2" section to those adjoining it, the smaller the hole gets the harder to overlap each section of patch.
Use one piece, & you will have a continuous "stringer" bonded to the hull.
Try a dry fit, using any thin material, I think you will find that the low side will easily pull out to match the other.
Just figure out how to McGyver something to tie the strings off to. IF you do it with the hull on the boat, it could be as simple as a 2x4 nailed across 2 saw horses. Weight the horses so they can't move, then drive nails into the 2x4 every few inches, so you can wrap & tension each string individually.
I used this method to fix a 2 foot tear in the bottom of an old Invitation dinghy,(very similar to a Laser) I set the boat on two saw horses so the strings were vertical, & used 5 or 6 pieces of broken brick as weights. The entire job only took a few hours, I used cheap 3M Bondo expoxy that kicked in 20 minutes, & we sailed a few hours later.[/quote]
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