Is the SMS Rule Broken, I Think NOT

Capt Araldite

Ship Creek
And JB you ended up with me 不不不
Seriously though I would always recommend getting it measured, even one designs vary a little and sails will be different. If it comes in lower than the class rating its a plus to you, if it comes in a couple of clicks higher then its fair to your competitors, and saves you the embarrassment if it ever gets measured at a regatta.