The bottom-most layer of foam doesn't have the undulations of the foam in the lid - it's perfectly flat. If one doesn't want the empeg to "sink" then one layer of "one row" from the plucked out foam can be laid down, this'll make to top of the empeg stick up a couple of millimeters above the foam and be "firm-gently clamped" by the lid foam. Where the edges meet is almost invisible. At http://www.tempsch.org, under the Raw Photos -> Pelican1200 (sorry, can't currently directlink it due to my DNS redirection) there are some raw (large) pics. 114-1428_IMG.JPG shows it pretty clearly. The foam can be cut to height, but it is hard to get a smooth result, witness the rear of the cutout in that picture, where the connectors go...

/Michael