Here's one for you, Make sure your motor wires are connected and not welded (soldered). makes it way easy to replace a motor if needed.

In extreme cooled conditions, or even if you're going to Cross through shallow water a nylon or plastic bag between the 2 pair of socks will make a big difference, the outer pair might get wet, but the inner pair (as long as the bag want have holes in it) will stay dry and worm.