Since the last launch didn't get above 9000 meters, Martin spent extra time measuring the payload and lift of the balloon. To go around the world, it's important that the balloon has enough lift to rise above weather that may push the balloon down, or coat it with water or ice.
Here's the mass breakdown of this balloon, with the same tracker electronics as the previous launch:
|2 solar cells & carbon fiber stick||5 g|
|Beacon PCB w/supercaps||7 g|
|Upper wire||1.5 g|