I fly SW often, and have taken many a sewing machine with me.....the key word here being one that I (meaning 130 lb. little ol' lady) bring it with me on the plane and off and let it rest either overhead or under the seat ahead of me. My grandchildren cannot believe their granny can do that. The black box for the FW was a problem at security once though; caused me and everyone around me to get wanded (whatever). A 301 should not be too heavy to handle; I have two, and they wouldn't be too heavy for me to handle--even though I might use one of those rolly type carriers. Good luck, Merry Christmas, Happy New Year (and keep us posted.).......