Okay, so maybe four years later is a bit much, but at least it's something
Simple zerk installation: drill horizontal hole of appropriate size approximately 5/8" (16mm) from outboard edge of tailgate hinge and tap in zerk fitting.
Service with your choice of grease; I used marine grease.
My spare is a OEM Gambler w/BFG MT KM2 ~84lbs. I don't always carry a spare, but the times I have were pretty punishing for months at a stretch.