Hi,seems a bit overkill for this simple soul
Cut the formers from stiff card with a sharp knife
Cut the bread sections with a coping saw
Along the keels line tap in pins at each station making sure they are square and use these to check the shape with the former
With Balsa wood it will sand easily. Its not a scale hull so as long as both sides are the same it wont make a great deal of difference
When buying balsa you can get a harder grade
Is this the wee boat you intend to build
https://youtu.be/nFCvNxCJPIocheers
frazer