You remove the yoke and two of the existing holes will line up with ez brakets. You need to drill the 2 bottom holes.
Rememer - you need to beef up the backing plate with plexi, wood, aluminum plate, etc.... Really an easy mod, but don't skip this step.....
I guess I should add.....If I were to do it over, I would consider someone else's suggestion of building a back plate with a bottom plate to support the bag from the bottom. My Drifters are pretty distorted and they don't hold the original shape. Too many beer runs I guess....
