<html> <body> Jack - I respect and empathize with the impulse to use your digital caliper for as many things as possible.  For example, I've been using mine in a system for key leveling which works quite well.  There are a few reasons why I might not be so comfortable with the application you present, but, even apart from that, I'm having trouble understanding the set up.  Perhaps you could supply some additional pictures (which were quite nice) showing the bass of the gauge from different angles.  I'm not understanding how you are establishing a zero setting from the keybed.  Also, I'm a bit uncomfortable bringing the end of the gauge in contact with the bass string windings...maybe a non-issue.  You have to be careful to establish positive contact with the wire, given the narrow width of the  and then, if you're not taking the gauge out of the piano, you have to be bent down to read it, Yes? An alternate application for the same purpose as the one you've proposed occurred to me.  Fabricate or obtain a block of a precise dimension (metric or english) - 5 or 6 inches, say.  Take the caliper and measure the diameter of the string whose height you wish to measure. Zero the gauge.  Place the block under the subject string, and, with the butt end of the caliper resting on top of the string, extend the depth rod downward to contact the surface of the block.  Add the read out to the block dimension and the result is your string height.  I'll try it out tomorrow to see if it really works.  Of course,  Pianotek's digital tape (David I.) seems awfully convenient, if a bit heavy to carry around, if memory serves. and cheers to you David Skolnik Hastings on Hudson, NY At 10:05 PM 7/23/2008, you wrote: <blockquote type=cite class=cite cite="">Sorry I forgot to put a Subjet /Title     Hello All,   I wanted to measure string height so I came up with a new gauge. It is very precise and also gives a reading of the string level. The three measurements shown are of the same note. I simply mounted my 4 inch caliper onto a base and I used a machine screw to hold it secure. With a simple turn of the screw it can be taken apart.   I can take an average or measure individual strings. The digital readout is easy to record the distance and move on to the next with out taking the gauge out of the piano.     Cheers, Jack Houweling    </blockquote></body> </html>