John, the information provided is readily available in the instructions supplied with the 90mm and 165mm leaf shutter lenses, and nothing is overlooked; users really have to put on one of these LS lenses and go through the RRR (rote, repetition and refinement) of movements. In active practice, the procedure of making sure everything is 'just so' and how it is meant to be can be mentally taxing, and mistakes can happen. Given the expense of camera and/or lens(es), coming to grips with the critical detail can save people unfamiliar with the operation a lot of angst. It's a fact that with the 67 /6x7 bodies, mistakes in operation can and do lead to damage of either the camera or the lens or both (focal plane shutter and leaf shutter coupling). Just one of the many varied engineering quirks of the Pentax system!
• If you have the patience, download the instructions from this stupid site. Rate the lens (!) and comment on it (!!) and with lucky charms a-clicking, the (grotty) download should beginneth.