Well, another good question on these forums that peaked my interest. So I went and took a look at my oven, how it is mounted. Actually I never thought about it. So once again, a question on these forums caused me to examine my camper a bit closer. Every time this happens, I learn something new! I love these forums!
So I looked! Mine is hanging from the counter top, no support on the bottom. The space under my oven is a cabinet with a door for storage. There is a wooden divider under the oven to keep objects from hitting the bottom of the oven. It's about an inch below the bottom of the oven. Looks like it's designed that way so there is an air space on all side of the oven. The only thing actually supporting the ove is the top on the counter, and the face of the oven where it slides into the cabinet on the front. Maybe it's designed this way to minimize any heat that may transfer from the oven to any wood structure around it. If it were resting on a support from the bottom, maybe there's a risk of it getting too hot and catching fire??? (I'm just guessing), but I think it's designed this way for the air space.
Looks like mine is held in place with two screws at the bottom of the oven, under the door hinges, on the face. It's just resting on the counter top.
Anyway, I took a look and just learned something new today I never thought of before.
Thanks!