Stumbled across this thread while looking for a similar crutch and I found this here: http://www.dontfret.com/notemap.html. I'm all the way out in South Africa so shipping the damn thing here would cost more than it's worth. I'm thinking of crafting one by hand by punching a few coloured sheets of paper, removing the strings from the axe, licking them down then taping them down with good old sellotape. I'll rip them off once it's all commited to memory. But I wanna jam NOW!