I was thinking about your wire-hell the other day when i was redoing the harness on an old BMW im restoring for a friend.
You Can see it in the album below.
Looks very factory, very clean and is a simple job to do (did most of it yesterday evening but forgot photos). I just use 19mm fabric tape from colorplast ... Like this one Fabric adhesive tape (L x W) 10 m x 19 mm Black Acrylic coated rayon fabric 16781 Coroplast from Conrad Electronic UK
Photo album https://plus.google.com/u/0/app/basi...platform%253D1
"With its rear mounted gearbox and transaxle you couldn’t help feel that some very innovative designers had worked on this car"
Innovative like an old Volvo! HAHA!