Since I did such a terrible job of glassing the inside of the hull on my first attempt I decided to put a second, large piece of glass on the inside of the boat.
I guess I covered maybe 40% of the inside of the hull with a second layer of 200g glass (equivalent to 6oz), so it should be very strong!
Here’s the finished product. Much better! This time I took extra care to wipe off excess epoxy during the initial curing process and I used a tape edge to stop the frayed glass fibres sticking.