[Q] Shostock 2.3 mf3 on stock slot want to go to 4.3 topic

att s4 running shostock 2.3 mf3 safe strapped. shostock rom is on my stock slot and slot 1. I want to upgrade to 4.3 mk3. do i have to odin back to stock 4.2 first to update ? Or can i just use the new mk2 odin files that just leaked to upgrade. Thanks