Fitting an end button is a small but important part of maintaining a string instrument’s structural integrity and overall setup. A well-fitted button ensures proper alignment for the tailgut, protects the end block, and provides a clean, finished look. The process involves inspecting the endpin hole, correcting any cracks, fitting the new button with precision, and seating it securely so it functions flawlessly and blends naturally with the instrument. - Remove Old Button: Take out the existing end button.
- Prepare the Hole: Use a reamer to ensure the hole is straight, smooth, and properly shaped.
- Inspect for Cracks: Look inside the endpin hole and check for any cracks in the end block or surrounding area.
- Repair Cracks if Needed: If a crack is present, inject a small amount of glue and install a spiral bushing to reinforce the area.
- Select the Button: Choose an end button style that matches the instrument.
- Fit the Button: Start fitting the new end button using a peg reamer for the most controlled adjustment.
- Improve Grip: Slide a short piece of latex tubing onto the end button, then wrap thread around it where the tailgut normally sits—this gives a secure grip for turning.
- Final Reaming: Ream the button until it fits smoothly, seating about 1 mm outside the rib.
- Tap into Place: Lightly tap the button into its final position for a clean, snug fit.
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