First i check BR version of stock image.
Firmware header have diffrent value of region code:
BR:
EU have 4555, US have 5553
I use hex editor to change this value in factory-eu.bin form 4555 to 4252 and use mktplinkfw tool from firmware-utils to check MD5 sum and again correct MD5 in hex editor.
Maybe someone add BR region code to mktplinkfw tool.