Had a local forum member make some acrylic goods for me which he dropped off today- 3 dosing boxes, a little stand for my doser, and my black baffles. Everything is top notch, and I'd recommend him to anyone looking or some custom acrylic fabrication in the GTA.
Here are the dosing boxes. Exactly as per my design, and they're amazing. I had the brief thought to turn one into a tank for my desk (....so I may have to place another order with Jamie soon!)
My original plans:

Jamie noted that the 2" opening would be too small to get a hand in to clean (good eye!), so after consulting with me, we changed it to 4". The result is:
You can see the little doser stand on top.
Lid detail (it seals the box nice and tight - perfectly made!)
More close ups:
Baffles were made in black to minimize the amount of light thrown around the sump, and prevent algae growth where it's unwanted:
Mocked up in the sump (with return pump and skimmer, of course):
