ok,
so i am buying a stages power meter, but am only 14, so i dont have lots of money. I have ultegra 6700 parts, but i think i am going to buy the 105 stages (non-drive side crankarm) because it is cheaper but looks almost the same as ultegra. my question is a weight weenies type question; does anyone know the weights of the ultegra 6700 and 105 5700 non-drive side crankarms?

thanks