Here the main bottom casing is glued and clamped into place. I used industrial sub-floor adhesive to attach it to the metal tank stand and screwed the casing to the stand from behind in several places as well. It aint going anywhere!
I couldnt use screws on this section at all but that glue is mega-strong and I have zero worries about the glue-joint failing.
Here you can see the 2 angled cleats attached to the wall and how the large upper casing fits into it. Doesnt look like much yet!
The upper casing all assembled and in place. Beautiful grain on those Ash doors!