Increasing LWL by 1.8 meters on Jeanneau SO 54

[zamibc]

Hi

I got an offer to extend the length of a brand new Jeanneau Sun Odessy 54 by 1/8 meters. The use of the extran length is to provide a spacious swim platform, some additional storage, etc.
It may increase speed (LWL) but I am not sure by how much.
Nothing else will change.
I appriciate your input very much, especialy from stability, performance, safety/

Thanks

Zami ben-Chorin

[Jeff]

Extending Jeanneau SO 54 Stern by 1.8 meters