<HTML>Charles, I also own the Spurlock jig, and use it regularly(Used it today, in fact= ).  It allows for quick and accurate work.  I also own the Schaff = wooden unit, which I use for setting the hammer line mostly.   Like most everyone else on this list, I was in the process of making one= .  Then I calculated the time required to make it versus what I could m= ake in the same period of time tuning pianos.  It was a no-brainer! Dave Stahl In a message dated 5/21/03 4:13:10 AM Pacific Daylight Time, mfarrel2@ta= mpabay.rr.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-= LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> I own and have used the Spurlock jig many times. I also have a jig very = similar to the #999 "Grand Let-Off Rack" on page 66 of the Schaff catalog (m= ine is home-made). I use both. The Spurlock jig is excellent and all you nee= d for in-the-piano let-off regulating. Assuming your hammers are bored consi= stently and the strings in the section are in the same plane (perhaps a big = assumption on some pianos!) the Spurlock jig allows very easy, very fast, ve= ry exacting let-off adjustment. All you do is regulate let-off on two end-of= -section notes and then use the Spurlock jig to set all other notes in secti= on to match. For bench regulation, I like to also use the wooden let-off rack. Maybe = related to my relative inexperience, I value being able so see the string pl= ane. It helps me when I am trying to determine an optimal hammer line height= , observe and measure drop accurately, etc. </BLOCKQUOTE> </HTML>