I've got three of them... The *thing* about them is the weight... seems like almost twice the weight of a 4-stop; and while I love them for their unique-ness, they don't have the power and action that a 4 stop does. I've got the only one he's ever made in the keys of G and A. He had to build it a 1/4" larger in width to accomodate for the large G reeds. I think it's also the only bright yellow one he's ever built. He said it was so difficult to make, he swore he'd never build another G. I love it!