Ok, so reading the recent wonderfully heated debate whether or not strings slowly stretch (elastic OR plastic) after the initial tensioning, I have two ideas for experiments: 1) Suspend a 150 weight with piano wire.     Make two marks near the ends of the wire (to avoid any complications from "settling" of  termination point knots or grips)     Measure distance between marks immediately after hanging.     Days or weeks later, measure again. If there is any sort of slow, creeping stretch occurring, in a weeks time the two marks should have traveled away from each other slightly. 2) Make a L shaped slot in a block of wood or metal.  (maybe the corner of the L should be slight curved to avoid a sharp kink)     Force a length of piano wire into the slot, bending it past its plastic point     Immediately remove the wire from the "jig" and measure the angle  achieved. (likely less that 90 degrees, right?)     Force a second, identical length of wire into the L shaped slot, and wait days or weeks.     Compare the two wires. If indeed a slow, creeping change happens to wire under sustained force, the second angle should be sharper that the first. Any thoughts? Kurt Baxter