We moved you post from the reface forum here to Legacy Yamaha a Synthesizer Forum, where it is more appropriate.

There is no cover that goes from one side of the instrument to the other, just FYI.
Can you post a picture showing us the bottom of your MOX ?
Are there missing screws? Are you seeing components inside the instrument?

There maybe a shape to the casing that looks like a semi-circular trench... But that normal.

Ok thanks. I´m new here so my apologies.

Well I see no components but there are holes that seem to be aligned for screws and all that empty space has no logic.

Here some pictures and sorry for the bad quality. If needed I´ll take others in daylight.

Ok thanks. I´m new here so my apologies.

Well I see no components but there are holes that seem to be aligned for screws and all that empty space has no logic.

Here some pictures and sorry for the bad quality. If needed I´ll take others in daylight.

It has no logic because you cannot see the inside of the product (and you are NOT supposed to). Looks perfect normal to me.

I´m sorry for beeing a pain but I think you´re not sure about it plus I cant find any photo anywhere to clarify that.
Just in case I need to sell it I would want to be sure what to say to the buyer. The guy who sell it to me closed the account and now I cant trace him.

Thanks so much Bad Mister for your efforts, very apreciated (sorry if my english is not the best).

Ive had mine from new and it is the same as yours, so all good