I have spent most of the day building the tracks and what a tedious job it was. However that's now out of the way and I can concentrate on the fun stuff. No idea how many links I used per side but I was getting close to running out of guide horns as a few disappeared into the carpet.
Each run had a bit of sag added but not too much. I may leave the side skirts off as there are plenty of references showing this to be the case. Once the tracks have dried I'm hoping to remove them in one piece for painting, well that's the plan!