I know back in the day when my son would con me into shipping his quad motors out for rebuild. We'd drain it of fluids, not carrying if we got it all or not. Them put'm in an ice chest, shtuff-shtuff around it rags, pads etc, tape the lid down, label it and Send-It!
Easy-Peezy Lemon Squeezy !
Jus'sayin...
Easy-Peezy Lemon Squeezy !
Jus'sayin...