Sliding stop for Paolini Pocket Rule style rulers

I bought one of those cheap copies of a Paolini Pocket Rule but it didn't came with the sliding stop. So I create a simplified version.

My version fits rulers with 25.4 mm (1 inch) width and 4 mm thickness. The original uses 2 screws to fasten the stop, my version only uses 1, it's an M5 knurled thumb screw.

For the screw i added a 4.5 mm hole in the print and cut the threads with a tap after printing. I also filed out the corners for a smoother fit.

I included the scad file so all the sizes can easily be customized to fit similar rulers.