Dismantle a ZP80?

[HootersGsy]

Has anyone taken a ZP80 apart? Just noticed whilst packing to move house that there's something rattling around inside mine. As far as I can remember it hasn't taken any hard knocks so not sure what it could be. Anyway, it sounds metallic so I want to get it out before any damage is caused.

I can't see any 'how to's on the net so hoping someone could confirm how to get in to it? Tried lightly prising the blue stuff up but don't want to ruin it if there's no easy way in...