by Hannah Beckett, RPT
This my new favorite tool. The 400-gram weight allows for consistent measurement on every key. Obviously, key height should be perfect before using this tool. First, set your desired key dip on a sample key anywhere except for the last keys on either end. I do this using the caliper method for accuracy. Set the tool on the key that you sampled, and adjust the float screw with a screwdriver so that the aluminum float on the top is completely level with the screw. It should look and feel completely even.
You're done! Now all you have to do is move the tool from note to note, observing the relationship of the screw with the aluminum float. Here is a photo of a pink punching (size .007) inserted on the same key demonstrating the visual accuracy of the screw and float.