is this a true formula abv=(1.05x(og-fg) /fg ) /0.79 my og was1.038 fg1.016 if so my abv is only 3% not much? I bought a kolsch extract kit with 4lbs german pilsner and 2lbs dme pitched wyeast 2565 one liquid pack. does the abv sound about right? instructions says og should be 1.042-44 first time reading hydrometer might have read wrong og? How do you choose a kit that will produce higher abv? thanks for you help. I am so confused.