I am installing a Delta neo angle shower enclosure. Because the wall were not a perfect 90 degrees the distance between the two jambs ended up being 5/8 of an inch too far apart. The instructions say they should be 67 1/4 inch apart so I don't want to permanently fasten them to the wall until I know if the 5/8 is too much difference. The instructions also mentioned a jamb extension, no explanation, no diagram or photo of a jam extension. I did not have anything in the kit that would be a jamb extension. I assume that whatever a jam extension would be it might serve to make up for this difference between the two jambs. Any help would be appreciated.