I don´t have the quark anymore. AndI´m not sure about the 7xl.

What about this setup:

Mamba max esc
Feigao 540 8xl
Heatsink clamp (xl)
UBEC
Strobe slipper with 51 T spur and 16/20 T pinion
2 x 2s2p 8000 mah 7.4v maxamps