You've got yourself a fine tool. I use one myself. I normally balance a prop in two axes i.e. both sides of prop horizontally level on the balancer. A perfect balance i.e. in all three axes, means your prop will stay stationery in any position on the balancer. This takes time and patience to achieve but a two-axis balance is normally good enough. Sand off the sharp burrs or mold flashes at the prop edges first. Use an x-acto blade to scrape off the heavy side of the prop, at the back of the thicker airfoil sections.