That’s awesome! I was just thinking about needing to do something like this for an upcoming beach trip, so I’m glad I saw your post!
Also, just in case anyone is interested, I was able to swap out the lock on the outside shower door with this lock (I also got others to change out the 751 baggage compartment locks too), so they are on the same key as the main door (which happened to also be a Global Link lock)
https://www.rvlocksandmore.com/Hatch...ck-key-Ready_3