In the early 90s, Rémi Boucher came to my shop and asked me to conceive a small practice guitar based on a prototype that he had made himself, using a ping pong paddle blade!
If the first goal was to work his right hand in tight spaces, like in train and plane, the prototype developed allowed him to work also his left hand, doing scales and arpeggios, while remaining few centimeters of the maximum dimensions desired.
This is the copy I kept and which was shown 20 years ago as part of the exhibition “Opus” at the Canadian Museum of Civilization.