That's good stuff Crownver, it's a little more refined than my way.
I have installed them for years without a tool. For a 1/4" Nutsert you get a 5/16" nut, put it in the vice and with a hack saw put some small cuts on the surface of the nut like cutting up a pizza. You then get a 1/4" bolt put it thru the nut with the cut marks on the bottom so they hit the top of the nutsert and tighten it with your hand tight. Put the nutsert in the hole then hold the nut with a wrench while you turn the bolt with a ratchet. And yes this was on aluminum ones.