Some years ago I was tasked to revive an old Roland AP-7 Jet Phaser. Wow, what a great sound! Can't say I'm familiar with the acts you mention, but once I heard the AP-7 my brain instantly said "Isley Brothers". Time was, you couldn't give these away. Now they sell for gold dust money. Funny the owner of the Jet Phaser said he found it under his sofa, totally forgot he ever had it, must have lost it there while partying too much in his early years. That's one to never lose again.