Pantograph for scaling up using 608 bearings

For construction of this model you will need:
5x 608 bearings
4x M5x15+ screw + 4xM5 nut
3x M3x 10,15, 20 + 3xM3 nut
one M3 and one M6 spacer
How to construct conection between arms: https://youtu.be/rPOF8rcytYY
Since you pobably won't find the exactly same "pointer" as I used, I made the hole for it a bit bigger (1.4 mm) and it can be furthermore easily edited in files "vnitr rameno vedl" and "vnitr vlozka" (EDIT: I also added a variation of the original models for use with a piece of 1.75 fillament as a pointer).
The scaling up ratios can be found on one of the photos.