He's the only person I know of that uses one, dunno if he's the first.

My name is Andy
Quote by MudMartin
Only looking at music as math and theory, is like only looking at the love of your life as flesh and bone.

Swinging to the rhythm of the New World Order,
Counting bodies like sheep to the rhythm of the war drums
I'm pretty sure Jonny greenwood had one installed on his backup Tele Plus although he uses the actual unit instead.