People are saying you can't flash back to 4.3 from 4.4.2, which is partially true.
Even when you flash the 4.3 firmware, you will still have 4.4.2 bootloader.
However, if you are not really fussed about the mini details, just flash it like you would normally with Odin,
then when there are problems with wifi, use custom kernels to fix it.
Otherwise, flash 4.3 then use a nand backup to restore (if you have it).
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