Re: Old piano wood
I tore apart an old upright and didn't find the soundboard to be very useable. There are lots of big spruce braces, though, that run across the soundboard that can be cut apart for brace wood. In the back of the piano were some +/- three-inch-square braces made of solid curly maple. These were big, hard, heavy braces. I think there were five of these and they ran up the entire back of the instrument. There's some really good neck wood.
The best thing, though, is to lay the harp on the ground and snip the bass strings while they are still at tension. Those things give a downright cathartic POW and fly across the street.
And I almost forgot, lean the harp against the side of the garage and give the neighborhood kids some tennis balls. The neighbors will all come out and listen appreciatively to the soothing WHANGS and SPROINGS.
I say go for it.
"They're approaching. That's very forward of them."