I came up with this idea because my wife got tired of using her beautifully manicured fingers as a truing gauge as a way for me to true my rims . Tools needed
1.) Channel locks
2.) Vise grips
3.) Table "you don't really care about"
4.) Old bike frame
5.) your spoke tightener
I gently spin the rim when it hits I make minor adjustments and before you know it , the rim doesn't hit the channel locks any more. I personally like to take the rubber off the inner rim part and use a screw driver to tighten / loosen spokes . It really worked nicely. It isn't 100% perfect but then again what is?