Direct soldering motor wires on MM makes a difference.

[captain harlock]

Just to add to what cartwheel has said:

In the past I was using the 3.5mm connectors between the motor(1950/10) and controller( Schulze 149.18) while 4mm connectors between the batts( 6s 3700mah lipos) and the esc. Stuttering and cogging were plain CRAZY. I then thought that I should use direct soldering between the motor and esc + 5.5mm connectors between the esc and batts.

For my amazement, cogging went down drastically, but there is still a very slight feeling about it, and the truck is accelerating much smoother.