Floor hatch warped

[Rumour2]

The hatch cover in the floor of my 250SLX is warped and rises in one corner towards the rear latch lock about a quarter of an inch. I have tightened the latch lock as far as the play allows. Any further attempted adjustment to the lock is not an option, as the strain on the hinge joints at the rear would be too high in my opinion.

Anyone know if it is possible to correct the warped surface? On top is the teak finish in very good condition.