Jim's idea would be a definite first step.
Here's some "how its built" info:
Sliding Hatch Teak Removal 101 https://c34.org/bbs/index.php/topic,7191.0.html
Here's some "how its built" info:
Sliding Hatch Teak Removal 101 https://c34.org/bbs/index.php/topic,7191.0.html