Why is the Intersecting Planes model make of acrylic plastic rather than Lexan?
Even though acrylic is more brittle than polycarbonate, it it more forgiving around solvents, especially rubbing alcohol used to remove permanent overhead projector marker lines. Polycarbonate will cloud up when most solvents are used. So, it was a choice of more user-friendly vs bullet proof. I picked the user-friendly.