Galaxy A12 (SM-A125W) GSI Installation

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Hey everyone, I have a Galaxy A12 (SM-A125U VZW) that was converted to SM-A125W (Canadian XAC) and has an unlocked bootloader. Are there any guides on how to install GSI's on this device? I tried using the Project Elixir GSI image and installed it to the super partition but the phone does not boot. They say flash it to "system" but TWRP says that the image is too big for the partition. Any ideas?