It's realy light your 808!!!!!!!!!!!!!!!!!!!!!!
My Hyper 7 pro, without any electronic (no batterie, no motor, no esc, no servos) is 6.2lbs

I realy want to have a light buggy like that.

But i have a 1515, i don't know de weight difference between a 1515 and a 1512?

But for the li-po i've a Flightpower 5000mAh, 4s, it about the same as you 4350, 5s