Neopixel Display Bezel Tile

This is a tile for my 42 x 7 neopixel message display. The display uses a neopixel strip with 60 x WS2812 LED's per metre cut into the longest strips that will devide into 5 metres on a 7 row display (42 to be exact). The tile will act as a curtain between each pixel and is a snug fit against the rear of an "opal" polycarbonate sheet. The result is perfect round ultra bright dots of light from each pixel but no bleed of light from pixel to pixel.
There is a border around two sides of the tile to help space adjacent tiles. Pitch between each pixel is 16.5mm and material is minimum thickness I thought would be robust (0.8mm) so can be cut easily with a few passes of a sharp knife.
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