This one works really good.
You can't tell from the advertised pictures, but you can set it up to let the prop hang off the side of the bench and then actually spin the prop around a full 360* circle and wait for it to stop.
It works very well. Well built. Simple to assemble and use.
http://www2.towerhobbies.com/cgi-bin...?&I=LXD712&P=7