Hi Dave, great idea, I also thought of something like this today, since I plan to get a DD20. Anyway, there is a device, it's called the "3rd Hand" and made by T.I.P., I saw it in an ad in the German maginze "Guitar / Bass". Here's a link: http://www.musictoyz.com/guitar/pedals/tip.php . http://www.harmony-central.com/Effects/Data/Tone_in_Progress/Third_Hand-01.html you also may check this link. A bit expensive, but it seems to be very solid. Best regards, Janosch