Builds from r1 to r5 are for Android 7.1 Nougat only.
Builds starting with r6 are for Android 7.1.1 Nougat only.
Builds starting with r12 are for Android 7.1.2 Nougat only.
Builds starting with r19 are for Android Pie only.
Flash the zip in your recovery
Auto-flash from FK Kernel Manager app, it's magical
Scroll down, choose your device & select the latest release to see the changelog.
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FK Kernel Manager video
Disclaimer to moderators:
Slight OT is fine, but when users decide to act stupid they should be dealt with with the appropriate means - its really annoying for me when OT turns crazy. Please put the warning/ban hammer anytime any of you think there's lack of respect and/or too much unwanted OT crap - but if it doesn't meet this criteria let the OT posts alone. Thank you.