Tank looks great. Is there a reason you chose the Kessil over a light bar style LED? Like yourself, I have a canopy over my tank that I really like and the kessil seems tough with a canopy (your solution is a good one though). Ive been leaning towards a reconditioned reef breeders 24" photon ($280) at the moment. It looks like a great light and I like the built in timer functions and ease of use with a canopy. But I would love to hear your reasoning for getting the kessil.
Quite a few reasons really. The biggest reason...cost. Where I work we have a large pet department with a huge saltwater section that is carrying higher end equipment now. I get everything at slightly above cost. They carry Kessil now.

Having said that, I love the Kessil so much I would have paid full retail if I had to.
But, having seen the Kessils over their 220 gallon tank as well as a few friends' tanks, I LOVE the shimmer. Some don't, but I enjoyed my tank just from the shimmer alone, even before I put anything into it.
I like the round, small fixture. I'm not one to want my tank flooded with light from one end to the other. I prefer to have the light at the ends of the tank gradually fade out to eliminate the boxy look of a tank.
It's amazing how much light a fixture smaller than a pop can puts out. It takes very little to mount them because of their size.
Also they are adjustable and I can add a controller (which I will at some point). I just have mine on a cheap dial timer to turn it on and off. I typically run mine at full actinic from morning until I get home. Then I manually adjust it to my liking, and later dial it back to full actinic later at night, so it's already set to that when it shuts off (and turns on in the morning again).
Everyone has their likes and dislikes, but I love Kessils.