Building my own center console

[Basketcase]

Using the method I've seen Strick use, I'm going to build my own console for my 20' since the boat did not come with one when I bought it.

What do I need to take into consideration when building this? I may one day decide to add a T top so I imagine I need to think about width. I have a grasp on the design I want as far as electronics, storage, etc. Just wondering about technical considerations such as how wide should the platform be that the helm will attach to?

Thanks guys. Even though my boat has no floor or transom, I'm going to make it a nice piece of furniture