This is our custom-modified Define XL R2 side panel, with a clear acrylic window installed. Previously the window is cut in a "L" shape, such that it shows off the motherboard and expansion slot area as well as the upper hard drive bay region. That design has been discontinued in favor of a less expensive option: we now simply take the tinted acrylic off a window panel made by Fractal Design and replace it with a clear acrylic window we cut here on-site.
Model: Puget Systems FractalXLR2_Window
Custom windowed side panel for the Fractal Design Define XL R2