Summary

B & G strings Bender for lapsteel or guitar.
4 screws 12 or 25 mm diam. 3 mm will be needed to adjust the high and low points of the levers:
e.g. : https://www.visseriefixations.fr/vis-a-six-pans-creux/sans-tete-hexagonale-creuse/bout-teton/sthc-bout-teton-acier-14-9-noir-din-915.html
Not printed yet.
FreeCad file available if you want to amend, modify, remix