Play CDs or DVDs on a record player
This wouldn’t work very well on a PS-F5 (due to the linear tracking being set to work with either 17cm or 30cm diameter records), but is interesting none-the-less. Re-purpose those old piles of useless old CDs by cutting grooves in them so they can play on a regular turntable.
No idea how Aleks Kolkowski is cutting them, but check out this video on YouTube of a homemade rig in Italy:
