Complex sentence: The Pianet soon found popularity with popular music groups of the 1960s, leading Hohner to produce the Combo model, designed for the performing musician, without legs, being designed to sit atop an organ or acoustic piano.
Split into simpler sentences: The Pianet soon found popularity with popular music groups of the 1960s, leading Hohner to produce the Combo model, designed for the performing musician in mind. This had no legs, being designed to sit atop an organ or acoustic piano.