happy - a handy thing in your shoting kit is a bottle of "White Out", the stuff we used to corect typing errors with typewriters.
It can be used to paint refernce lines on sights before they are moved. As the sight is moved, you will see the break line on the white blob and cana ccuratly see how much it moved. When all is done, it scrapes off with a fingernail.
I have a bottle in teh shop and have used it ob all the dovetails ights that need moving, plus ona ctions crews so I can see if they start to back out. Also use it on some pistol front sights to enhance visability.