This will not allow you to multiboot yet, but if I can get this part figured out right, I will try my damndest to get the kernel in order. Needs a kernel that supports kexec-hardboot (just for the primary rom). Also, help from other devs would be greatly appreciated considering that this is my first "real" attempt at anything like this. I have attempted to port the Multirom recovery (TWRP-based) to the Avant. I can't test it because if it doesn't work, I have no access to a pc, so could not use Odin to re-flash stock recovery (or any working recovery). I feel like it will work, though, but do not test unless you have a way to restore if it fails. I am not responsible for any damages, blah, blah, blah, etc, etc... Unzip and flash with either of these methods: Flash on device with Flashfire app or through Odin on a PC... You will also need Multirom Manager if/when we get the kernel sorted out.