Maybe I took the manufacturer message to heart too much because I'm always trying to keep my PV vertical when I set it down. Do you really think it makes much difference? What position do you set your unit in when not in use? I've taken to using my old ash trays as holders because it keeps the unit at least at a slanted angle. I think a short juice glass works even better. Maybe we need PV "ashtrays" to be constructed. I almost never set down on a table or something in a horizontal position. You have to so something with it while you use your hands to type, so what do you do with your PV?