Adjust the mortising jig to the proper hinge size and door thickness. Install or remove the corner inserts, as appropriate: Depending on the inserts used, jigs can cut mortises with rounded or squared corners (squared corners must be finished later with a chisel). Fit the jig onto the edge...
I usually use the jigsaw for solid wood cuts and rough cuts at that. No need for the guard. In this case, it was just a jig so again, no real need for it. Of course every cut benefits from the splinter guard but unless it is truly necessary, I usually don’t put them in. Repl...