Has any of you experienced camera builders come across these types of springs? "Zugfeder" is the German term, the closest equivalent I found in English is "tension spring", perhaps there are other names.
Can these be used for a DIY spring back? The springs pictured are the ones I have and are pretty strong and stiff, but two connected together seem to have about the right tension for the 14mm thickness of a Fidelity holder. Any ideas? Thanks for your responses.
Attachment 120433