I've got a 17 with an ATEi milled slide with GL429 sights installed by Doug. I got the dot zeroed today and it's shooting POA/POI at 25 yards. However, when I look through the irons the dot is just left of the front sight post. Now I know not to use the irons in conjunction with the dot, but it irks me that everything isn't centered. The irons are good to go. Even amounts of dovetail on either side of the rear sight and the front is perfectly straight. Everything I've found on this subject says they're two different planes and may or may not be perfectly aligned. Is this true? Should my dot be windage centered or is it something I just have to deal with?