Fresh back from Sports Italia who were very accomodating. Bacon Butty, coffee and a quick shifty round the car. And more importantly point out why I couldn't remove the parcel shelf. With my new found spannering skills I was half way to dismantling the petrol tank guard rather than the actual bolts holding the rear blind. Matt was very diplomatic!
Once the correct nuts had been unscrewed (recessed in holes in the top of the rear of the boot. Picture looking vertically up)
The shelf slid out quite easily as promised. My QP has the Blaupunkt NIT and only has a single woofer in the parcel shelf. I doesn't have the additional smaller speakers at the sides which are on later models. (see Gazcw's picture above)
The only wires that had to be unclipped were the ones for the rear blind on the left of the picture above. I was going to Dynamat the underside of the parcel shelf but when I saw the raised hatched reinforcement I decided not to. Maybe after a couple of months of isolation (Carona Virus for those that may read this in the future if we survive), I may "whip" everything out and do it! I was also intending to dynamat the base under the parcel shelf but as you can see there's already some wadding all over it and wires to get out of the way.
Anyway the woofer was replaced (£39 on ebay inc free postage vs £600 from Eurospares!) and now I have some bottom back in my music.
Putting it back together was easy - Matt did most of it!
The hardest bits were getting the side bolsters back in. The knack is to get the top clip in first as it is horizontal so hardest to judge. You can see where you are by looking down through the rear windscreen. Once that is in you can feel with you fingers where the lower one should line up as the clip is vertically orientated and then punch it in.
Many thanks to the forum for your encouragement and advice, to the orginal poster on Maseratilife for the How-to, and Sports Italia for finishing the job.
Eb