Default Can we share experience about porting ROM to G2?

In LG G2 forum I saw many ROM Port from other devices.Can we share how to porting ROM from other devices to LG G2?
I start port LG G Flex KitKat firmware to LG G2 some of LG App FC .who can guide me or we on LG G2 forum for correct method
for porting ROM.

Mobile :LG G2
Tablet : Nexus 7 2013 LTE
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