I've just fitted said floor sections on my back and it wasn't as difficult as I thought it was going to be. The rivnuts were already there (first job done)the chassis having been turned upside down. I was going to get assistance to fit the floors but had a go on my own and it was ok. I was going to use a stick on seal (draught excluder) but found a product that Ford use to seal the rear lamps. It comes on an 18metre roll and is a bit like play doh. I think it's worked out quite well. I prefer to be able to remove the floor panels for access in the future. If you want the part number let me know. Brian.