Nexus 7 has got a new custom firmware based on the latest Android 4.4.2 KitKat.Lego Android 4.4.2 KitKatcustom firmware aims to give you all the features of Slim ROM while adding a few exclusives (features' list shared below). If you are interested in trying out a new ROM for your Nexus 7 2012, here are the steps to flash Lego Android 4.4.2 custom ROM on your Nexus!

Lego Android 4.4.2 features:

Everything Slim has plusROM is built with sabermod 4.10 (thanks @cl3kener!)Lockscreen NotificationsTime-contextual headersHalo and halo colorPeek!Driving ModeSimple DPI Changer (on-the-fly one causes UI glitches and breaks xposed per app settings)Bring back activity arrows for connection icons on statusbarWakelock blockerBattery saver modeDisable FC messagesCustom scrolling valuesAOKP system animationsApollo from dirty-unicornsOmni's DSPCM's file managerOmniSwitchLegoStats, and LegoOTAand more!

Prerequisites to check before you flash LEGO Android 4.4.2 on Nexus 7:

Downloadand install USB drivers for Nexus 7 on your computer.Enable USB debugging mode from developer menu.Your Nexus 7 2012 should be unlocked and rooted.You should have a custom recovery tool like TWRP or CWM installed on your Nexus 7.Backup anyimportant databefore going forward for the tutorial.Ensure that your Nexus 7 carries more than 70% of charge.

How toupdate Nexus 7 to LEGO Android 4.4.2custom ROM:

Required files: download the Lego Android 4.4.2custom ROM firmware file fromhere. Also download the Google Apps Package for Nexus 7 2012.Save both the files on your computer and do not extract the contents.

Connect your new Nexus 7 with computer using a USB cable and copy the firmware and GApps files on your device' SD card.Disconnect your Nexus tablet from computer when the copy is done.Turn off the Nexus 7 2012 completely and reboot it into recovery mode.Perform Nandroid backup of your current OS:Backup and Restore>BackupNow perform data wiping tasks: selectwipe data / factory reset,wipe cache partition, and finallywipe dalvik cache.Return to the main recovery menu and selectInstall zip from sdcardfollowed bychoose zip from sdcard.Locatethe downloaded LegoAndroid 4.4.2 based custom firmware file for Nexus 7 and confirm the installation.Once the custom ROM is successfully installed on Nexus, repeat the above step but select GApps file this time.When done, reboot your Nexus to boot into the newly installed Legocustom ROM.Ta da!