The RMS narrow lower control arm “stance” greatly increases stresses. If you hit a chuckhole, the weld where the front of the arm meets the pivot tries to rip apart; this artifact is multiplied by the fact that there’s near-zero compliance built into this design. For a quick demonstration of the narrow vs. wide stability and strength, try standing with your feet close together vs. spread apart. OEM strut (r.)absorbs all road shocks in pure tension, an inherently reliable design.
