Paul’s video on the #78 is adequate for me. I have on occasion made a wooden fence that is longer and wider than the factory fence. I set my iron flush to the sole and use the lever for all adjustments. The light hand approach while planing works well for me. And, as Paul would remind us, your iron should be as you can get it. And I find Paul is correct to remind us to start the far end of the rabbet and work toward the back. Fifteen minutes of practice on scraps before you use your project piece is always a good idea. If you place your off hand properly you can insure that the fence square to the edge, it can also hold the plane flat to the surface and insure that you are perpendicular . It is truly a matter of practice and muscle memory. Poplar and pine scraps a great test pieces.