That is not true at all. Who says the whole loom hasnt been changed.

Theres a lot of text in this thread so im sorry if this has already been said, but in the long run it will be far better to remove the entire loom, the looms are one whole piece, i would almost guarantee by the time you have finished snipping wires and labelling etc it will take longer than removing it, and also more complicated.

Especially as its a cabriolet the rear section of loom is even easier to remove (no rear wiper etc)