First take off

We inflated the cubic balloon that's inside the wood structure, and "cut" the umbilical cord of our baby, I mean the RS232 cable that connected the onboard Linux computer to our ground-station laptop (see picture: cable hanging down). We were all worried because:
1) we didn't know how much to inflate it
2) we didn't know if it'd take off at all
3) we weren't 100% sure if the balloon was big enough to contain sufficient helium for take off, and compensate for structure+mecatronics weight
But, when we saw it majestically and quietly take off, we immediately turned off the helium valve and put the stopper on the balloon. Waow. Really: WAOW!
Look...