I don’t know if htis would work or not for elderberry, but if so, it woudl cut way down o n the work- it has slots i nthe back for ther berries to slip out of too- one person for another similar type said it didn’;t work good on whiole bushes, but worked pretty food for smaller clumps-
Those teeth look too widely-spaced for elderberries, but maybe it’s the angle of the photo.