This is the microwave installation we did on our 98 16 ft scamp deluxe ... The microwave is installed above the fridge replacing the cupboard.. In our model there was a factory plug installed in the back of the cupboard above the fridge , our plug was fortunately in the right position to clear the microwave ........

After I removed the cupboard door I built a base that will securely hold the microwave in place .

I set the base in position and secured it with wood screws and left enough room on the top of the opening so I could slide the microwave in and set it down on the new base 

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I set the microwave down into the base and now it is unable to move back and forth (DO NOT FORGET TO PLUG IT IN )

I picked up some trim from the lumber store and the closest match  they had to birch was hemlock .

I finished the trim with 2 coats of light oak stain , it was still tacky the next morning so I let it sit another day ....

I wanted to be able to remove the trim so I could take out the microwave if needed . I secured the trim with plastic washers wood screws and the small plastic brown snap caps from scamp , It also matches the deluxe interior .

Another finished picture  

Check out the nice rack that was built and installed by the previous owner , he also built another one on the cabinet next to the front dinette and a small shelf in the back of the trailer for setting your small items on such as your keys, wallet, cell phone or maybe even your eye glasses .....