Tried this and there are several options.
The spacesaver conversion replaces the floor with the netting with a flat hinged panel, beneath which is a new tray that covers the spare, gives support to the new flat floor panel and provides some limited storage.
First I tried the multifold netted floor over the top of the new one. It fits and works in so far as it will give you the second tier netted storage but a flat floor underneath, which is above the new spare wheel. However, to fasten it in place you would need to cut two approx. 25mm squares out of the new flat floor to allow the rearmost latches to clip into place in the locator's in the floor pan.
Next I removed the new flat floor and just replaced the original multifold, which could then clip in place. This give you the raised net storage as above and allows access to the top of the new tray above the spare wheel. I've put the first aid kit in there and the relocated 'tool kit'. So, you do recover a
little of the lost storage. You could probably put a groundsheet in there and a few other bits and bobs. This does mean the floor beneath the raised net is not flat though.
To try and move the multifold floor to its rearmost raised position you would have to butcher the new tray and I'm not prepared to try that.
At the moment then, I have the multifold floor over the new (shallow) tray so I have a bit extra storage and the option to have the raised net store above other luggage, albeit this luggage will rest on the new expanded rigid foam floor.
I've removed the 'mobility' spare tyre stuff from its place in the right hand rear boot wall and put a 'wet weather' drivers side car seat cover in there. I may get another for the passenger side, or look for a SLIGHTLY smaller first aid kit as the ex-BMW one I have is just a little too big to fit.
Hope that helps those with insatiable curiosity or enquiring minds?
