I am about to embark on building the USS Oregon (BB-3). Rolling paper barrels has been a "challenge". I am planning on turning my own from styrene. I was wondering if anyone has a link to the specs on the 13"/35 cal gun. and the 8" guns? I am trying to determine the length, diameter at base and muzzle so I can turn the ratios accurately. Has anyone seen such data? I will settle for approximate values to get the right look.