What engine are you using? 16oz. is my most common size of tank, I do have a 24 oz in a 1/4 scale Fokker D-VII and that is for weigh. I have my timer set for 15 min. and I have about a half tank left. I run Zenoah 26, 38s and 3 DLE 35 ra. Your 32oz tank will make your airplane very nose heavy and add to wing loading. Just mt 2 cent.
Beautiful airplane
Rich