Can't get handle off
So exterior handle outside just decided to not to control the look any more so I went about the business of taking off the whole lock. I had to drill out two screws because they were stripped and then what looks like what is holding everything in place now is the interior handle, which I can't seem to figure out how to get off. Any hints? Also, are the bolts that I had to drill out, fairly easy to obtain at home depot?