About the fan speed setting for R1 V1

HI, MY R1 is the v1(no IBTS),I want to change the fan speed setting like the V2, Which firmware vision can I use for the old R1 V1. THANKS

As I understand it, f/w detects the Bullet version, so the current version (553 stable or 558 beta) s/b fine. You can (should!) confirm that with Aillio Support.