Realistically you couldn't bring Hood's 42,000 tons down to 27,000, a hull as large as Hood's is just way to big. Also a range of 28,500 nm at 10 knots is a very unrealistic speed. The RN KGV class range was 15,600 nm at 10 knots and this was a 1937 design. A 1921/22 design would have a more dismal range.