I have a rear sight that has no markings on it and is canted to the right when installed. It has to be moved to the far left in the dove tail to approach point of impact. It looks like it’s original. Now do I get this at 90 degrees with the dove tail so it looks “right”? It is a single step elevator with the pull to the rear of the semi buckhorn. It also has a single screw to adjust and hold the height blade. Does anyone know how I can get this square? Thanks