If you need a more "authentic" touch, there are other portable options that don't fold but offer better key action:
The “Presto 88 Portable” is conceptualized as a lightweight (under 10 kg / 22 lbs), fully weighted 88-key digital piano with built-in speakers, Bluetooth MIDI/audio, and a battery-powered option. Its primary innovation would be a folding or split-keyboard design combined with a graded hammer action mechanism—something rare in the portable piano market. This report evaluates the technical challenges, market demand, and potential success of such a product. presto 88 portable
Presto K8 Portable Lathe Record Cutter and Player | Reverb France If you need a more "authentic" touch, there
Many units are still in use for specialized vinyl cutting services, though they often require restoration to modern safety and speed standards. how to operate these vintage recorders or information on where to find parts like cutting styli? Presto Recording Corporation - Steam Powered Radio Presto K8 Portable Lathe Record Cutter and Player
: Precise groove depth is often regulated by an "advance ball" on the cutting head rather than a counter spring, which allows for more accurate recording on lacquer discs.
