Rear Parcel Shelf Heat Shield Removal

I have chased this through the forum for weeks, to no avail. I'm in the middle of a reupholstering and recarpeting folly on the QV. The carpet on the rear firewall tucks under the parcel shelf. There are apparently 3 studs holding it down, but access to them is behind a panel in the engine bay, under the rear screen. This panel appears to be held in by three nuts and large washers on three long studs, but removing the nuts doesn't seem to loosen anything up. Are there other fixings I've missed? I have also read that there are rivets that require the side glass to be removed for access on some cars - I really don't want to think about that

 

Yep. And mine is curved. I'll see if I can send a pic...

 

Not too clear, but you can see the studs
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That's what I'm asking. Maybe it goes down a bit further and the pipe brackets bolt through it. I've got a fabric insulating material that obscures things a little - it's from a 328, not sure if the QV had it.

 

Far be it from me to stop you from channeling your inner couch potato! The Frankenferrari motor is almost ready, so I might wait until then. In the meantime, I'll go ahead with the re-upholstering, but it will look funny with the door carper not matching until the carpets get done.

 

Thanks, that's actually very interesting and useful information, but what I can't figure out is how to get the engine-side panel off, if you have any thoughts...