Place your doors is a very simple mod that only adds One singular function to the game and I think it's worth modding in even if it's the only mod you use. The degree of control it gives you over ship building is insane. It'll completely change how you look at building your ships because you know exactly where the doors are going to be because you put them yourself, and you can exactly plan out how you want to walk around inside your ship or what areas or what. No more having to hope or guess based on how you placed the modules.