I just made this piano key; the cost of filament is around $0.15: https://files.catbox.moe/kvop4m.webm https://files.catbox.moe/kvop4m.webm So it's in the ball

I just made this piano key; the cost of filament is around $0.15: https://files.catbox.moe/kvop4m.webm https://files.catbox.moe/kvop4m.webm So it's in the ballpark of a couple dollars per octave. I agree that's not very competitive with paper.