I would pay extra for a kit that includes an alignment jig for each specific phone type. You only get ONE shot to get the alignment of the adhesive correct, and I’ve never managed to do it.
Either that, or sell the replacement displays with the adhesive already attached to the back of the display assembly so all I have to do is swap over the home button, attach my cables, peel off the protective cover over the adhesive, and just lay it down.