I was recently lurking around the Harmony Central bass forum when I came across a thread on the pros and cons of bolt-on necks. One poster said this: "There is an easy way to improve the neck joint of a bolt-on significantly: remove the neck and place a piece of window-screen between the neck and body; tighten the screws and it bites both sides stabilizing tuning and incresing sustain." Is this true? I've never heard of this technique. Has anyone here tried this?