[Nexus 7 (2013) General] sfhub:
KRT16O Factory Image available in Downloads section (below)

KRT16O OTA (flo/WiFi) available in Downloads section (below)

As first mentioned by mandrsn1 in this post KRT16O "KitKat" is rolling out now.

I did not want to hijack that thread, but wanted to have a simple continuously updated first post that summarizes experiences and consolidates resources like OTA URLs, Factory Image flashing, etc.

You will soon be seeing comments from folks about how KRT16O affects the remaining Multi-touch and Random freeze/reboot issues on google product forums:

Google Nexus 7 product forum

KRT16O touchscreen experiences (near the end of thread)

KRT16O touchscreen experiences (2nd thread)

Mixed improvement with WiFi turned on and Bluetooth keyboards

pil-gss wakelock issue appears fixed

If you need to refer to the old JSS15R thread, it is here.

Initial impressions

Magnetic smart wake when wifi lost or deep sleeps appears to be fixed

Fix is in 4.01 bootloader - not necessary to flash 4.4 KitKat ROM (thx meekrawb)

Some bluetooth keyboard improvements

GPS/pil-gss wakelock issues appears to be fixed

New touchscreen software.

Mixed results, will likely depend on screen, some fixed, some not, improvement from JSS15R

ghost touches with aligned fingers mostly gone

stuck touches seem to be gone or greatly reduced

may still have missed touches

may still have slight jitters with aligned finger dragging

Does NOT include GEL (Google Experience Launcher)

install extracted N5 GEL and new Google Search if you want the new experience (thx jxr94)

use Nova Launcher if you want transparent status bars

Root can be installed in the same ways as 4.3

If you use NRT (Nexus Root Toolkit) follow this procedure (thx ruggie0)

Logistics (only for people trying to downgrade or mix/match rom/kernels)

You cannot "dirty" flash from 4.4 rom/kernel back to 4.3 rom/kernel, you'll need to wipe data/factory reset

4.3 kernels will not boot 4.4 rom

New FLO-04.01 bootloader.

New boot animation, sounds, icons.

New Easter Egg (thx magnumlove)

settings->about tablet->android version (rapidly tap 4 times)

Tap "K" a few times to make it spin, then see the final prize

New ART (Android Run Time) replacement for Dalvik VM

Enable using settings->developer options->select runtime

Apps should be odexed (stock is odexed)

First boot will take a while (possibly 15+ minutes)

New cloud/network print options

The new tap and pay setting only shows up if you already have NFC enabled. (thx albundy2010)

To get tap and pay working you need to get the N5 version of Wallet (thx ruggie0)

Quick benchmark1, benchmark2 of 4.4 and stock Dalvik (thx Vanillalite)

Quick benchmark1, benchmark2 of 4.4 and ART (thx Vanillalite)

Change summary:

JSS15R(4.3_r2.3)->KRT16O(4.4_r1.1) AOSP - TBD

Bootloader version: FLO-04.01

Android version: 4.4

Build/ROM version: KRT16O

Kernel version: 3.4.0-gb0eacf3 / Wed Oct 23 17:41:58 PDT 2013

Mini guides:

adb sideload (install OTA using stock recovery, no need to unlock, preserves user data)

flashing factory images (factory image restore, must be unlocked, option to preserve or wipe user data)

restore stock recovery (if you've installed custom recovery and want to go back to stock)

installing OTA-compatible root/SuperSU (will install SuperSU and fix so that it works with OTAs)

entering safe mode, bootloader, stock recovery (button press sequence can be tricky for fallen android)

Universal ADB drivers (use these if you have trouble with adb recognizing device)

Downloads:

KRT16O

KRT16O Factory Image - flo/WiFi (thanks Zaphodspeaks)

KRT16O Factory Image - deb/LTE (thanks Zaphodspeaks)

Source: pure stock

Format: flash in fastboot/bootloader

Guide: flashing factory images

Caveats:

requires unlocked bootloader

options to wipe or preserve user data

JSS15R->KRT16O OTA - flo/WiFi (thanks kenned88)

Source: pure stock

Format: flash with stock recovery (adb sideload) or as regular update.zip in TWRP/CWM

Guide: adb sideload

Caveats:

MUST be running unmodified JSS15R

does NOT require unlocked bootloader

if you are rooted with SuperSU 1.51 or earlier, OTA will fail near the end. See this post for explanation/fix.

if installing via twrp/cwm suggest installing SuperSU update.zip PRIOR to rebooting to preserve root and custom recovery

preserves user data

KRT16O repackaged TWRP/CWM-flashable - flo/WiFi (thanks scrosler)

Source: slightly modified stock

Format: flash as regular update.zip in TWRP/CWM

Caveats:

this is stock functionality but not pure stock binaries so will not work with future OTAs

bootloader 4.01 flash is a SEPARATE install (needed for magnetic smart wake fix)

this is pre-rooted with init.d support

odexed and deodexed versions

preserves user data

Stock kernel/recovery (unzip and flash via fastboot/bootloader)

fastboot flash boot boot.img

fastboot flash recovery recovery.img​

flo/WiFi

stock JWR66N kernel

stock JSS15J kernel

stock JSS15J recovery

stock JSS15Q kernel

stock JSS15Q recovery

stock JSS15R kernel

stock JSS15R recovery

stock KRT16O kernel

stock KRT16O recovery

deb/LTE

stock KRT16O kernel

stock KRT16O recovery

Bootloader - flo/deb (unzip and flash via fastboot/bootloader)

fastboot flash bootloader [filename]​

Bootloader v3.14

Bootloader v3.15

Bootloader v4.01

Root/SuperSU

UPDATE-SuperSU-v1.75.zip - install in TWRP or CWM for root (recommended for 4.4)

UPDATE-SuperSU-v1.55.zip - install in TWRP or CWM for root

Custom Recovery (unzip and flash via fastboot/bootloader)

fastboot flash recovery twrp.img​

TWRP 2.6.3.1 (recommended for 4.4)

Stock missing/modified JSS15R files

flo/WiFi

update-JSS15R-debuggerd.zip

update-JSS15R-thermald.zip

update-JSS15R-audio.a2dp.default.so.zip