I currently have a Crosman 2300KT with the Williams Notch Target rear sight installed for shooting with irons. I am thinking of trying the LPA MIM rear sight on another 2300KT. Before I buy one I thought I would ask here. Does anyone have any experience using both of these rear sights so that they can compare the two. The target type knobs on the Williams make it look like it might be higher quality but it is actually substantially cheaper than the LPA MIM.