This print allows you to make a 20mm mark on a slimline (25mm) Venetian Blind blade which you can use to cut with scissors. (My window opening was not quite as wide as the stock 750mm wide blind and I needed to take 20mm of each end of a blade as well as separately cut the top mechanism and bottom boxes)
(26 Dec 20 - Added a 30mm cut mark version)
Printing vertically is best to get good shape for the narrow slots.
Strongly suggest rafts are need to prevent early plate separation.
The author hasn't provided the model origin yet.