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Message: <blockquote data-quote="Stephen Howard" data-source="post: 628676" data-attributes="member: 41">You can adjust these screws without the aid of a leaklight by simply playtesting the horn.Back both screws off so that when you press the low F key down, the Bis Bb key doesn't fully close - and when you press the G# key (with the low F key down) the G# cup rises slightly.Now adjust the Bb down. Press the Bis Bb down, press the low F down and note the gap between the adjuster and the Bis Bb arm. Turn the screw to close the gap (it'll take a couple of goes). When it gets close, blow a long Bb (top B key + low F). It will probably be weak. Lightly tap the Bis Bb - this will give you a rough idea of how far you have to go. Make an adjustment and playtest again. When you get a strong Bb the adjustment is complete.Now do much the same for the G#, this time using a low D as your reference. Play the D, hit the G# key and see how the note drops out. Adjust and repeat until the D holds strong when the G# is pressed.The caveat is that this method works fine when the horn is in good order. If there's wear in the action or a few iffy pads you're going to have to go back and forth with both adjusters in order to find the best compromise....which may mean backing one of both adjusters off a little.It's possible to improve on the adjustment by changing the regulation on the lower stack...but then it all gets very much more complicated. But the method above should at least get you back to where you were before you moved the adjusters.</blockquote>

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