Instructions:
1. Installation: Make the endpin-hole in the cello even/smooth with a standard reamer (1:17).
2. Insert the cone, which ranges in diameter from 23 mm to 27 mm, into the cello as far as it goes. Make a pencil line marking the border of the protruding part. Take out the cone and cut on the line with a saw. The remaining portion of the cone can be shortened to about 3 cm (1 ¼ inch). The endpin will fit perfectly into the cylindrical hole inside the cone. (Cones with diameters from 20 mm to 23 mm can be ordered separately.)
3. To play with a bent endpin: Pull out the upper (outer) tube completely, fold it to the 25-degree angle, turn the upper (outer) tube clockwise and push it all the way in, so it will get full support from the ”house”. Lock with the wing nut. For a longer bent endpin, use the lower (inner) tube. Do not use force, thumb and indexfinger is enough.
4. To play with a straight endpin: Pull out the upper (outer) tube completely, then push it back in 1 cm (1/2 inch) and lock with the wing nut. Do not push it back in more than 1 cm (1/2 inch). For a longer straight endpin, use the lower (inner) tube.
5. Lock the lower (inner) tube by turning it clockwise. Unlock it by turning it half-a-turn counter-clockwise. Leave at least 5 cm (2 inches) of the lower (inner) tube inside the upper (outer) tube, otherwise the endpin looses steadiness and can break.
6. To withdraw the endpin: Unlock the lower (inner) tube, then unlock the upper (outer) tube, push in both tubes and lock both tubes.
7. Do not use pliers or excessive force when locking the upper or lower tubes, this can cause the endpin to break. Thumb and index finger is enough.
8. If the lower (inner) tube does not lock securely, take out the lower (inner) tube and put a few drops of alcohol on the white nylon at the inner end of the lower (inner) tube. Put the lower (inner) tube back, and pull the lower (inner) tube in and out a few times to clean the inside surfaces. Wipe the lower (inner) tube clean with a dry cloth or tissue. Repeat if necessary.
9. Do not apply or allow oil or fat between (inside) or outside the tubes; it will cause the locking system to function less efficiently.
10. To replace the tip/point, unscrew the old tip/point with a wrench and apply a small drop of “light” thread locker, contact glue, or white wood glue on the thread of the new tip to make it grip.
11. To change tube on the exchangeable model: Pull the upper (outer) tube all the way out, angle it 25 degrees, and turn it counter-clockwise (to the left) until it comes out of the “house”. If the locking mechanism falls out of the “house”, put it back in. To replace or put in another tube: Align the locking mechanism so that the steel thread at the end of the upper (outer) tube can catch the thread in the locking mechanism. Place the threaded end of the upper (outer) tube back into the “house” and turn clockwise (to the right) until the thread is all the way in. Put the the tubes in straight position and push them back through the “house” and into the cello.
12. Warning! The tip/point is sharp and can cause injury.