<HTML>In a message dated 5/19/2003 7:31:39 PM Pacific Standa= rd Time, tune4u@earthlink.net writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">and if so, should I go for 1 3/4" or 1 7/8"? Is there a simple way to decide this, or do I need to completely regulate 3<= BR> or 4 keys before I know it will work? </BLOCKQUOTE> Alan, Regulating 3-4 samples is good practice on any regulation, and doesn't take = but a few minutes. It will show the level of consistency in the action, and = will make sure you have workable regulating choices. 1 11/16 to 1 7/8 will work, and even 1 11/16 will give ample power for most = players, so the first place to look is a blow that will require a dip of aro= und .390-.420. Another clue can be had from the engagement of the jack and t= he butt. The leather that the jack pushes on should be approximately perpend= icular to the jack, when at rest. That allows the jack to slip back under wi= th a minimum of lost motion. If, on a very slow release of the key, the jack requires more than a tiny bi= t of lost motion to get back under the butt, either the blow is longer than = optimal for those parts, or the hammers are too long. Either will force the = butt back too far, creating a "cavity" under the butt that won't let the jac= k by without too much lost motion. The action will still work, but this is a= clue that it is not set up as designed. Too many words, but I'm trying to m= ake sure the description is clear. If the leather is the other way from perpendicular, and the dip is shallow, = you are wasting power. Bob Davis</HTML>