Hi, well you don't really need the plans, I researched the class about 20 years ago. Your model hatchway has been closed in to stop the water entering as the full size were just open large dinghys.
I think there is some one on the forum who sailed in them.
I seem to remember that the yachts varied as to how much was spent on them. Some had just a canvas deck others were immaculate.
Looks very nice though.
regards Roy