I have looked my XDS 45 over but see nothing to loosen on the rear sight to be able to adjust it. the point of impact on mine seems to be quite low. i have been compensating at the range with it but would like to try to make some ajustments. i also have a XD 9 and it shoots great,it is right on but i don't think it has any way to adjust it either. any comments or suggestions on this? thanks in advance!