Niiiiice. Custom? I have a Martin on the boat, and it stays perfectly tuned. Don't know why.
I have always carried a wooden guitar on board also... A Taylor for a while, then it started corroding around the frets... Took it home and replaced that with an Alvarez classical. Don't know why, I rarely play anymore. Bought the Rainsong as a favor... Not custom OM-1000 it sounds good and plays great. Bet your Martin sounds excellent... Always wanted one.