Complex sentence: The Pianet soon found popularity with music groups of the 1960s, leading Hohner to produce the Combo Pianet model in the early 1970s, 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 music groups of the 1960s, leading Hohner to produce the Combo Pianet model in the early 1970s. It was designed for the performing musician, without legs, and intended to be sat on top of an organ or acoustic piano.