Hello Simon ,
print former on a printer, cut out paper patten , pritt glue to timber, ply , card what ever,
or do what i do stick to card to make templates , for another build, or you could also use tracing paper ,
also if you go down the printer r0ute print out another plan, al;ways handy….
see paper print out on bulkheads in picture, remove with damp sponge when ready ,
hope this helps ….Larry..