That looks really good.
I will be using urethane adhesive to stick the top part. But to do that I will have to cut the excess part of the arch under the flare. Leave 3/4" - 1" lip hanging and roll it outside, so the flare will be sitting on top of it. Than I will apply urethane adhesive between the rolled lip and fender flare.
Bottom ends will be screwed so no need to apply adhesive on those areas.
I will take some pics of the trimming and installation process of the other side and update the OP.