RV Adjustable bed: Custom King Doppelflex MX2

Custom King Doppelflex MX2 TWO-MOTOR ADJUSTABLE BED SYSTEM (36″ x 78″. Piano hinge to lift platform to access storage is 30 inches from the headboard. To continue to access the storage compartment, cut the external frame 31 inches from the back of the adjustable bed. The remaining external frame is screwed on the lower platform with four L-shape brackets for each adjustable bed that are pre – installed. This allows the lower platform to be lifted up, as per normal, to access the storage area, without the whole adjustable bed being lifted off the platform.For further information, click here:

In addition, both adjustable beds have Straight Back option where the head and back sections set up to move in one plane. (The default is to allow the head to raise up first without moving the lumbar/shoulder). Side sleepers love it but some people with GERD/Acid reflux , prefer to sleep on their backs and do not like the head to be tipped forward. The ‘Straight Back ” option addresses that desire for a flat head/back motion.

RV Mattress model: Two DW 800 mattress medium firm to the comfy. each 36 x 78 inches

RV Model: 2022 Newmar Dutch Star

Location: Henderson, NV

Customer: Bill & Celeste Amburgey

The adjustable bed foot section is purposely made shorter to rest at the end of the foot of the platform. When both right and left sliders are brought in, the foot section is about an inch from the cabinet and will therefore not graze it. Also the foot stopper for the mattress is about 0.5 inches below the underside of the cabinet. The mattress is a low profile 7.5 inches thick mattress but sits about 1-2 inches taller than the underside of the cabinet table. Thus the foot section of the mattress has to be lifted up a tad when both the sliders are brought in for driving so the platform can be inserted under the top of the cabinet.

The two transformers for the two adjustable beds are located in the storage compartment. They are the white plastic boxes with the wires snaked up to connect with the two motors. For power, the wires are snaked under the bed frame and connected to the 120 V power outlets on the right side of the bed.

Note that the wires for the transformers are run just under the carpeted lips and into the cabinets where there are two 120 V outlets. Also there should to be an air gap from the metal side stopper from the window valance. In this case, somehow Bill and I failed to pick that up when going through the dimensions. Because our mattress cover is thick and soft, it yields when the back is raised so it does not prevent him from raising the back up.

Same comment of the air gap between the side stopper and window valance.

To install the mattress side stopper it is easier to first remove the slats from the head and foot regions of the adjustable bed. By doing so, the shadow of the slats will not hide the two holes we have predrilled to secure the two hooks of the side stoppers. There are two side stoppers on the left and right of each adjustable bed to prevent the mattresses from sliding off.


You screw on screws which we include to secure the side stopper to the inside of the adjustable frame. DO NOT screw the screw all the way in as it will break off the head of the screw. Half way is sufficient. Come in at slight angle when threading in the screw; not horizontally. The holes made on the side stopper are purposely made at a 15 degree angle to just bite into the top section of the inner frame.


The foot stoppers are screwed on top of the wood beams. There are three screw holes so you can position the foot stopper to project 0-3 inches from the end of the adjustable bed frame. Depending on the length of the mattress, you can place the foot stopper to be adjusted accordingly.  The coffee-colored sliders are set up be together in the center for the softest setting. By moving them progressively apart, you can make each double slat firmer and firmer. The customer liked a softer setting to start with.

We blunted the edges of the frames. You can see the location of the lower side stoppers.

The platform is raised for access to the storage compartment. We are unique in being able to cut the back external frame to the hinge point so only the lower external frame is screwed on the platform section which is raised. If that were not possible, the whole adjustable bed would be in midair when the platform is raised!

The platform is raised with the mattress in one motion. The customer is considering adding a wooden stick that drops down when the platform is raised (secured to the underside of the platform with a hinge on one side and Velcro of the other side).

Flat position for both beds.


Handsome installation! And a better night’s sleep!