Try "RockMyMoto" to root 4.2.2, then immediately use Sunshine to unlock the bootloader. After the bootloaders unlocked, it's safe to update to 4.4.4 using the other threads in this section.
I use this armband which I had for a previous phone and it works well. It is called "Verizon Motorola Droid X MB810 New Sports Armband Pouch" and pretty cheap on eBay.
Pictures of my Droid Maxx in the armband
Droid Maxx in armband - Imgur