Depends on how you have the blade oriented. I would probably have the edge facing out instead of in, which would make the blade drawing easier, and then you can rotate the handle in your hand once it's out. If you do a partially open-back sheath, maybe with kydex inserts or something, it would be pretty easy to draw and resheathe.
That would be quite entertaining to re sheath. Remind me to put a disclaimer of liability on that one.
Warning, resheathing of Machax may require surgery for an extra elbow, severing of your carotid artery, torn ligaments and extreme irritation. lol