Ok, had a new HR20-700 installed this afternoon. I've been playing around with the options and using the Tivo to HR20 survival guide (I miss the Tivo OS soooo much!) and I'm stumped. How do you change tuners on this blasted thing? At the moment I've got both tuners recording a show. I'm watching one of them (live TV) and want to switch over to the other show that's being recorded. It won't let me. If I press the PREV button it tries to take me to a third channel that isn't being recorded, thus cancelling one of my current recordings. I've read the owners manual, searched this forum, and read the guides and all I can think of is that I'm just too frustrated to see the obvious. I miss the "down arrow" button on my Tivo Series 2. Please help.