Sequential circuits samplers

Hi fellow members

Is it really true that no one can tell me how to open up the Prophet 
2000?

I've unscrewed all the obvious screws to open up the unit (3 screws on 
the left and right and the top 3 screws on the back) but I'm still 
unable to open it.

I've opened up and maintained several other machines but this one 
gives me a headache. Maybe the hole chassis is bend due to mishandling 
and that is why I can't open it, but it sure would be nice to know if 
that's the case.

Please respond if you can.

Best regards

Brian