I can report back on my rather pricey tube of glue and..
..I'm quite happy with it, actually.
I doesn't quite give you the full 60 second adjustment time 'like it says on the tube', but it's not a completely instant bond and I was able to shift the seats and tables slightly after I'd dropped them into place.
I think this may be the last knockings of the old mould for the seat units, however, because the tables came a bit taller than they should have done.
Well, 1mm or so, anyway, but it makes me think that perhaps the rubber has stretched a little as the parts have been removed each time.
This meant I had to go through the rather dull process of sanding a little off the bottom of each casting on a sheet of sandpaper before gluing it on.
Otherwise it all went quite smoothly.