Today I perminently mounted all of my windows. This was a bit of a big deal as the openings were not finished correctly. I glued wood blocking into voids and cut out the openings proper and filled and sanded them. Here is how they look now from the inside.


I have finishing rings for the inside but they came off of a fiberglass truck top. it was very thin and so my thick walls do not work with them. I used plan B which was simply to drill through the outer aluminum window frame lip and stainless steel screw them into place. It actually worked quite well.