Ok This shelf is a variant of others, but simple, removeable when not using, and easy to make. The shelf in my Sprinter is leaning towards the bed, so with this shelf I get the necessary width to support the CPAP machine. Made out of 1/4 inch oak ply. The shelf locks on the original shelf that has a lipped edge.
Great idea. I installed a 12 Volt (cigar lighter) under the cabinet which is over the head of our bed. It is for use when boondocking. Also purchased the charger brick for use on 12 Volts.