I've been cutting Kaizen Foam inserts for a Rigid Mobile Gear Cart, which are available for various types of tool and gear boxes from KaizenInserts.com. This particular box can hold up to 5 layers + one in the lid of the box. The layer I'm cutting in this video would be the third from the bottom, although I made a 1/4" MDF shelf about 4" off the bottom rather than use the bottom two foam layers. The layer above this one holds a laptop computer, mouse and HDMI/USB adapter. The top layer holds a Yamaha audio mixer and wireless microphone. I've used the box on a couple of occasions so far and all seems to work well.