It seems to me that these mechanisms are easily made from bent wire, maybe a little solder
https://hanfling.id.au/wire-bender-wire-bending-jig-youtube/uncategorized/
It seems to me that these mechanisms are easily made from bent wire, maybe a little solder
https://hanfling.id.au/wire-bender-wire-bending-jig-youtube/uncategorized/