Can i flash the .200 firmware from this website onto my "generic LAM" international?

I have an "international" model that i believe is the LAM (Latin American Model) and i want to downgrade from .224 to .200 (for ivoryroott to backup DRM before bootloader unlocking) The only place i can find any .200 software is from the linked site below. I want to make sure its safe for me to follow this website and flash this firmware so has anyone used this website before? What gets me concerned is that at the end of the firmware file that you download to downgrade your phone, it has "_NCB" this makes me worry its for a particular model... I have plenty of experience with android and development but this is my first sony phone. Also, ive already checked XperiFirm and it doesnt have any software for any of our models BEFORE the .224 or .254 firmwares which i thought was weird.

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Thank you guys for any help!

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