What's wrong with the string? But I nearly always leave mine in place. Removing it does not create a larger aperture.Someone told me last week they had seen a little dock that fits onto a Backscatter OS-1 Snoot to hold the aperture card when it isn't being used. Anybody seen the stl file for that?
That said, I could make a dock or clip that would parallel the barrel with little effort if there is interest.