It's actually not secured yet. I included a couple of hexagonal openings in the long legs of the print that should accommodate a heated brass standoff just about right; it'll be very similar to your alignment pins. I used the idea on my last keyboard and it worked well. The gap will be closed a bit more after securing the screws from the bottom plate. It will be nowhere near "perfect," and but the end result should be a bit cleaner than this in-progress state. I am fairly pleased how decorative grooves draw the eye away from the seam a bit, but I'm not really trying to hide that it is 3D printed, and that in two pieces.