Thank you all for your replies.
Paul, no damage, I am just concerned about all the bodges and loose ends that are under the dash plus corrosion, poor crimps etc at terminals. I do intend to lose the immobiliser during the job.
Adam, I am still getting to grips with what actually comes with the Stack & how it connects to the main loom. Any further info appreciated.
Manxseven, many many thanks I just have phoned Tony & reserved one of these! This could be the best way for me to start.
Gary, there is no way I could do this myself but I will phone later for advice & a chat.
L7 FUN