So here is my finalized custom 3D printed Donut Heaven. Thanks again to OlliG for his great original 3D design, and his openness to share his source with my so that I could create my own custom version.
For the lighting, I used a red Comet 20 LED Matrix strip cut to length (non-frosted) to light the sign, a white 20 LED Matrix strip cup to length (non-frosted) to light the interior, and a white Matrix 12V 8 SMD flasher to light the side wall donut. I tied the 2 strips together with a splitter, ran cable under playfield hole directly below the DH, and tied into a GI bulb. For the donut light, I ran the cabling through the same hole and tied it into the flasher (OlliG's idea) directly below the DH area.
Exposure was hard to get right with my camera phone, but in real life the red looks perfect while the interior light also looks great showing both through the windows and actually emphasizing the brick texture I have on the walls of the building. The orange flash is awesome, and again the camera doesn't do it justice.
Before installation
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Exposure set to highlight the nice red of the sign
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Close up
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Far away
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Donut flasher