Fair points about the cables - though not sure you've id'd the rear brake cable correctly - that's actually pretty snug, and the slight curve you can see at the rear is a fixed guide.
The seatpost is the original....
Yes - GPS mounted on the handlebars. Not for navigation ( ! ) but as an alternative to a bike-computer to measure time / distance etc.
The brakes are Avid Elixir disk on the front and XT canti on the back, but with Avid levers for both - which feel just great. Pics attached since someone asked...
Sucks that the weather is so cr*p today....