Has any PV500 owner had this done yet? Mine is on 140 hours now, so am starting to think about getting this done, but have concerns about the fact that no one yet seems to know how adjust the H or V geometry. I read on a post that it didn't matter too much as this can be set in an external scaler, but I think this was refering to a Lumagen where as I have an iScan HD+. Can anyone help/comment on the ISF or calibration issue? Am I best to change my scaler?