If you print the pdf as actual size, it should be the same as below.
For the 6x6 mask:
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93.4mm x 71.3mm - outside
65.5mm x 65.5mm - inside
3.6 mm x 3.2mm - oblong hole (side with one short diagonal cut)
21.5mm - center of oblong hole to side with short diagonal cut
3.2mm - round hole (side with 2 diagonal cuts)
65.8mm - center to center of holes
2.7mm distance of the slot for the film guide rail.
4.1mm to center of hole that's under the film rail guide slot.
2.7mm - film rail guide slot height
67.1 - film rail guide slot length
The bottom notch between the holes clear is to clear the latch.
On Sat, 28 Nov 2015 15:17:05 +0100,
dont.spa...@googlemail.com
(Hauke Fath) had a flock of green cheek conures squawk out: