Connectors or Direct solder for esc & motor?

[RC-Monster Mike]

Pretty sure I have the controller mounting thing down. :) The problem is the sometime very large jumps at my local track, along with an occasional driver error. A sudden impact in the right direction can pull the plugs out. I use 3.5mm plugs, not 4mm, but same idea. Another thing I have against the plugs is the wear. They loose their spring tension over time, which eventually leads to what I described. I use plugs on some, direct solder on others. I prefer direct solder.