Direct soldering motor wires on MM makes a difference.

I too had a cogging issue that I traced to a bad Deans connector. Maybe it was just dirty, but the episode left me paranoid about all of my connections. Considering the high amp draw of brushless systems, I started looking for a good solid connector with low resistance. I was looking around for some 5.5mm connectors, but stumbled across some 6mm connectors, on (believe it or not) Neu's website. They had both the 5.5mm and the 6mm. I got the 6mm because I figured that bigger was better and get this. $25 for 10 pairs, shipped. These connectors are short too, so it should make getting connections connected a bit easier.