Fitting the dials, switches and lamps took a surprising amount of time but the good news was I could do this in the dining room rather than in a cold garage!
Some of the holes in the fibreglass came up too small to tuck the leather through with the switches but this was fixed by carefully opening up the holes with the Dremmel. Its not too scary to do as the padding separates the leather from the fibreglass.
Here's my first attempt at wiring everything up. Not as neat as some I've seen and even though its going to be hidden its on my list for rework.