When I went for the Derail base, which by the way is awesome, I lost my brake mount for my Reeder. So this custom brake mount is the solution. The plate that goes under the Reeder has oversized holes drilled for adjustability. The aluminum post that the brake clamps onto has a pointed set screw for adjustment side to side and up and down. The base is a piece cut from a GB4 stiffener plate. I haven’t tried it on my Coker but it should work with the GB4 Coker handles as well.