SRAM XX1 Eagle 12-Speed GripShift Shifter with Discrete Clamp, Black with Gold Logo stems and the shifter lever can

and the shifter lever can be repositioned as well

SRAM GX 11-Speed Rear Derailleur Rear Derailleur UPC: 710845771859

so it will not turn while work is done on the hub

if you weren't already completely convinced on the 54t ratchet kit I hope this is the turning point to getting one

SRAM XX1 Eagle 12-Speed GripShift Shifter with Discrete Clamp, Black with Gold Logo stems and the shifter lever canThe SRAM XX1 Eagle Trigger Shifter features a carbon trigger and cover for ultimate weight savings. The trigger glides on precise, near frictionless sealed cartridge bearings for an exceptional feel. Includes lock on grip Adjustable carbon trigger and cover reduce weight Discrete clamp or Matchmaker X compatible Item Specifications Color Black Gold Drivetrain Speeds 12 Rear Der Shifter Compatibility SRAM X Actuation Shifter Style Twist Weight 124 SRAM