I managed to shave off 80g, shortened ESC wires, soldered directly to motor (so no heavy corally connectors), removed motor heatsink & fan (motor isn't getting too hot really), but leaving ESC fan on.
Seems perfectly balanced on axis too & no mass tweak.
so from 1508g to 1428g..... do you think that will make a difference?
I found a way to get it to 1350g exactly, but that makes it slightly left unbalanced.
also who is gluing their blocks onto the rims????? 