This Syzr S/S pedal system has the RIGHT pedal set up with a 5mm (shorter) leg length discrepancy, but the shims can be transferred to the LEFT pedal.  Also, either pedal can be set up to utilize just a 2mm or 3mm shim, as well.  As shown in the photos, the right pedal is currently set up to use BOTH the 2mm shim and the 3mm shim, thus compensating for a 5mm leg length discrepancy.  Removing either shim will decrease the discrepancy by the shim's thickness.