[Q] 2014 Kindle fire hd 7 (4th Gen) Root/Recovery? 1 month into the search topic

All,

I've been digging through the forums patiently for a month (12/25/14) looking at every root method listed and none have worked. I thought its time to ask for help. 2014 Kindle Fire HD7 (4th gen) fireOS 4.5.2
Goal is AOSP roms.

I've gotten at least 10 ADB usb drivers and found one works newest version. Able to send ADB commands.

Kingo
Root with Restore bin4ry v36
VRoot 1.8.0.1245
Root master 1.3.6 (chinese)
towelroot
firerooter 0.3
kindlehd2013 root
root_script
QemuRoot v1.0

Anybody have a direction to look at?