Going off of memory here, but I think the rotational stop points are determined by the latch, not the handle relay. In other words, I don't recall any hard stops inside the relay unit. So, in theory, a slightly longer or shorter actuator rod connecting the relay to the latch would cause the relay bell crank, and thus the handle, to stop at a different angle. I would experiment with a junk actuator rod - try bending it a bit to shorten it and get the splines where you need them.