SIK0T33NB2 > Q&A

I purchased the bms_tcu. I want to flash my tcu using the ek1 mini. If I decide I didn't want the tune and want to go back to stock original tune can I? I keep getting told I can read the tcu which I know but that's not what I mean. If the tune doesn't work properly and I want to go back to stock how do I do that? SIK0T33NB2 2019 Genesis g703.3t. I don't see anything in q&a that has my original file and I don't want to flash my tcu unless I know I can go back to original if I need too.