[Request] ASRock X570 BIOS usable for X370?

Request: Reduce File Size of X570 Taichi bios from 32MB to 16MB in order to use on X370 Taichi

I am trying to figure out the best method to do this or if its even possible. I have an external usb rom flasher that I can use for recovery if I need to. I can successfully use the X470 Taichi bios which is already 16MB on my motherboard, but I want to try using the X570 bios with re-sizeable BAR.

EDIT by Fernando: Thread title shortened