I decided that On Tour's included guitar grip was a bit cramped and I wasn't gonna take it! This is what I came up with instead: I used a PS2 Guitar Hero wireless controller, after gutting it and some careful soldering I had a wireless DS guitar controller. More pictures and explanation here: http://www.flickr.com/photos/29701602@N03 http://www.hackaday.com/2008/08/20/hack-guitar-hero-ds-into-a-guitar-controller/