Minor remix to create a Letter Opener blade.
2023-08-21: Added Trigger Spring V2 and removed the original, to improve reliability of the trigger mechanism.
2023-08-22: Added V2 of the Blade (and removed the original blade). The V2 blade reduces blade wobble; improves the locking in open & closed positions; has sharper edges; has a taller Catch/Hook for the rubber band(s). It now works quite reliably in all orientations.
Tip: You can use multiple smaller elastic bands, instead of trying to find that single large rubber band with just the right length & strength.
The author remixed this model.
Minor remix to create a Letter Opener blade.