The 12-7.5in gun cruiser design works

I just did a preliminary run of my program with the design that I proposed. The dimensions are 665ft x 66ft x 23ft with a normal displacement of 13,620 tons. The coefficients are Cp=0.56 and Cm=0.84. The power plant is 90,000 SHP for a speed of 32 knots at normal load. I was able to have a 4in belt, barbettes and turrets, with 3in + 2in decks. The metacentric height at normal load is 3.86 ft. The range at a normal load, with 1,000 tons of fuel is 4,709 nm at 15 knots. The range with 2,700 tons of fuel, at 15 knots, is 12,715 nm. The full load displacement is 15,976 tons. The speed at full load displacement is 30.8 knots. The armament is 12-7.5in/50 and 8-4.7in/50 guns. The 4.7in/50 guns are DP. The design includes a catapult and hanger.