Speed Square notched

Added a notch to the STL - USE THE 3MF

**Edited** notch missing! - I've now added it on version3.
this is the metric version - thank you to those that had a look at this. it appears that the bambu slicer does not include the notch (Negative part cylinder - when exporting to STL file, it was definitely in there as I printed one.) I have tried a few times to export to STL and it doesn't include the negative part.

Anyone feel free to comment if there's a way to do this in the slicer and I'll upload it.

apparently the solution is to click on the main object and choose mesh boolean to rejig the STL file to include the negative part.

sorry to the folk who added it / Tried it on the previous versions. the v3 has a 2mm notch, the 3mf file has a 3