Betsy, a thought or two on your dustpanel idea. Make the panel flat, not a rail and stile as you would typically see. On the top back corner of the drawer,the corner that will be traveling around the arc not the corner with the post, build it up just enough so you can put a thin piece of uhmw tape that will rub on the dust panel above.The dust panel below should have just enough gap below the drawer to put a piece of uhmw tape either on the bottom of the drawer edge or on the panel itself. These should keep the drawer flat and snug when rotating it although it may sag slightly when opened all the way.
Steve Jenkins, McKinney, TX. 469 742-9694
Always use the word "impossible" with extreme caution