Log / transfer scribe - tesařské kopírovací kružítko

This log scribe was developed for making log house. You can use it for copying of profile to building material. Maximum capacity of this scribe is more than 33cm (13 inch).
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How can use it?
See on video
https://youtu.be/UPB2lT-mdrE?si=RmEFoBig_5dTXsFM&t=632

BOM:
screw M5x25 and M5 wing nut
screw M4x20 and M4 wing nut
6x screws M3x20 or 25 with wing nuts
2x screws M3x15 with nuts (print bed_nut.stl)
washers
1x spirit level (in my example $2 for caravan, this was bought in hobby marked)

Marker for wet wood (or carpenters pencil)