I once programmed an arduino driving multiple solenoids with felting needles at pretty high speeds (wool felting uses needles to push wool fibers together into

I once programmed an arduino driving multiple solenoids with felting needles at pretty high speeds (wool felting uses needles to push wool fibers together into shapes), all pointing to the same target area, at slightly different timings. In the perfect case, it worked really well. Felting needles however bend and break with heavy use, leading to colliding felting needles projecting toward my hand. Ouch.