Tweaking the GB/CL/1921 Design

I am interested in further modifying the GB/CL/1921 design. One thing I want to experiment with is to move the forward guns further towards the bow. I also want to do away with the semi-superfiring 4.7in/50 guns, at the forward and after parts of the superstructure. I would put all the 4.7in/50 guns on the broadside (3 per side). I want to move the funnels forward, as well. I might even try to increase the machinery power, if there is volume to expand further.