Is the only way to make the full stringer take old one out? Or can one be added on? Or one ran beside it? If so then I will just put the floor back in. That is if anything other total replacement is a waste of time and weight. This is my first boat and don't know if I want to mess with aligning the engine to the pump. Could I possibly sister (bolt) one up on the outside of existing? I watch HOLORINHAL do it and I want to try it. Any help is greatly appriciated Thanks Johnf.