Quark Woes --- Need help please

[Serum]

Daf; the fact that two quarks have got the same problem on the truck, i think you can start to look at the receiver or the BEC. perhaps it's something thermal in the BEC that makes the voltage sweep, causing the esc to act weird, or not at all.

[Dafni]

We already tried 2 receivers, 3 different locations.
But the UBEC is a good tip, charging up a RX pack as we speak :)