i would not set my wheels myself using this method
i doubt the angle numbers in the picture will be an exact match for the alignment numbers from the shop
BUT, as a reference guide to know when the wheels might need re-alignment
first have them aligned, or know that they are aligned
take your pictures
record all camera settings, distance, everything
using paint draw lines in a "copied" set of pictures, not to measure exact angles, but to make templates
whenever you want to check alignment take new pictures using the exact distance and position settings
draw lines on the new pictures
see if they match
