This is a bit winded, sorry.
I have a surprising amount of custom, laser cut acrylic in Nostromo (the nerd codename for my box - long story).
The laser cut parts include a magnetic front door cover, a matching magnetic frame, an internal exhaust vent, 4 QB side light protectors, a frame to hold the upper QB and it's heatsink, potentiometer dials for my dual dimmer box, and my plant training platform and cage, something I call Flatbush.
WTF is Flatbush? Flatbush is both plant trainer and a 3D scrog. Did that help?
Flatbush is an acrylic baseplate with a training system made up of bolts, eyehooks, and a lattice of fishing line. This gives me a huge array of anchor points below, essential for manipulating in a tiny space. I'm scrogging from below.
Flatbush also includes a mid and upper level 3D training cage. I'm not managing a 2D canopy, I am managing a 3D canopy so that I can best light my plant from the sides as well as the top. I didn't always have side lighting in Nostromo. I'm glad I went through the effort. It has made an astounding difference.
My ultimate, but still unachieved goal is to have every square inch of my box producing bud, zero waste. I'm not there yet but on my last grow I got pretty damn close. To achieve this I need to be able to easily pull branches down flat, to grow them horizontally whenever possible. I also need to be able to precisely position (and often reposition) branches and buds, regardless of where they are on the plant. This is especially important during the 2-3 weeks after I flip. During this time I am basically doing bonsai, using Flatbush and the cage. After 2-3 weeks I'm mostly repositioning buds as they get fat.
In the very first photo on this post you can see Flatbush in use ( the photo with the lighter in it). If you look close you can see the two tiers of clear acrylic at mid level and near the top of my plant. This is just a fancy tomato cage, with anchor points. Unlike a tomato cage, these two upper platforms allow me to pull branches in any direction, inward, outward, diagonally, etc.
The bottom Flatbush platform is actually 2 layers of laser cut acrylic. Flatbush sits on top of, and in, my flood tray. White acrylic, unfortunately, is translucent but black acrylic is opaque. The top layer is 1/4" thick white acrylic. The bottom layer is an identically cut sheet if 1/8" black acrylic, providing 100% light block. The bolts around the perimeter hold the sandwich together and are also the anchor points for the "scrog".
Below is a picture of Flatbush, sitting outside of Nostromo. One of the two clear acrylic training cages is installed. The top level cage can be easily added as the plant grows.
Cheers if you made it this far