Oh, what to do with the wiring to make it look oh so pretty and organized...
The braided sheath is very nice and looks the same. I use it regularly with managing fibre optic strands and it works very well in my application. However, to get it to look really pro, one has to feed the wires in from one end and it's somewhat difficult to branch off individual wires so it's usually best for transitioning stuff from one place to another with nothing leaving the bundle.
An alternative to the regular braided sheath is split braid. Same as woven braid but is split like regular plastic split loom. It works quite well and allows for individual wires to leave the bundle through the split. To make it look pretty when wires branch off the main bundle, a small slit must be cut in the overlapping braid to allow the wires to exit cleanly with no bunching of the sheath at that point. A hot blade is good for this as it fuses the plastic braid so it doesn't tend to unravel.
Lacing looks great and is (now) pretty "old school". It was used quite extensively in the telecommunications world before cable ties (or zip ties or tie-wraps for us Canucks...) became ubiquitous. It's fiddly to get to look right until you get the hang of it but it's one of those lost arts. And it's kinda tough to repair or add on to it. Does look great, though.
Velcro. Fantastic alternative to cable ties. Plus reusable. Wont scratch your hand, if you don't cut the ends off perfectly flush, when you're reaching into a tight place as cable ties often do. Other positives is that its cheap and easy to install. Looks cleaner than the plastic Tie Raps.
And I suppose one could use cloth tape. Works well if applied correctly and looks period correct if not quite as clean looking as other methods.
Sorry, didn't mean to open this can of worms with my joking about the wires at your fuse panel. It's tough to pick apart anything on this fantastic build and pure jealousy - gotta get my digs in and kick down the high fliers, don't ya know...
Keep it up and keep including us in your insanity.