i would like to know if it is worth it for me to find my specs like rev rate, PAP span etc. now. the reason that i am not sure is i am 14 years old so i want to know should i do it now or when i have stopped growing because my rev rate will probably raise because of a rise in hand strength PAP may change a little so should i wait till i am 16 or 17 when i have pretty much stopped growing to find my specs?