A couple coats clear urethane bring out the grain of the oak and matches the camper paneling. Next I built a funky shelf to hold whatever, in the space below the refer.

A refer shelf for the Engle45 that ties into and is supported by the two sides of the water tank box.

Adding the top for the water tank box, then building the bed slide and side supports.

How did you attach the cabinet frame to the camper? Did you screw into the aluminum frame studs or the wood wheel well or both?

Texan,   At this stage I have two screws holding the face frame to the rear wall up by countertop level to keep it plumb. The top 1x2 framing at countertop level is just floating at this stage. The 1/2" plywood is screwed to the floor pack. If I take out the screws from the plywood and those two other screws, I can lift this section out as a unit. The vertical section of plywood is off the side wall by an 1/8".

Countertops are built out of quality plywood and Formica. In these pictures the plywood edges are still raw. I will finish the edges with 1/4" oak. Tops are temporarily in place.

Made the cutouts for the stove, sink, and faucet and dropped them into place.

Started running 12v wiring. The water tank fill and vent lines are installed. 12v receptacle in corner above fill tubing is for the Engle45. Another view of the funky shelf.

View of sink drain through cabinet floor to outside of camper.

Reinstalled the refer shelf and added a double USB port receptacle at tank step area. Extra hole is for a standard 12v receptacle.