Doesn't the blip box use a Garmin 1/4 turn-style mount? If so, why not get a stem cap mount for the blip box, and run the wires through the Aeria stem? This would mean that the wires are almost invisible to the wind, the box is accessible, out of the way and as per Cyclenutz' diagram, it would likely sit out of the wind behind the hydration... (assuming it would fit there)