I am in the middle of my boat project (20' mirro deep aluminum v with a 175 johnson) I want to get a stainless "destroyer" style steering wheel for it. I have 3 choices 11", 13", and 15". Which is the right one for me? I would like to go with the smaller one to keep things more compact, but should I get the larger one because of the larger motor I'll be steering? I used the search function already, and didn't come up with anything.. Thanks, Jim