I play my (carved) bass with a quite short endpin (less than 10 cm out, including rubber stopper). It is the same length for playing standing or sitting. Actually, I never change the endpin position, neither for storing (as it fits on the stand with the endpin out), or for transporting the bass (since it fits in my car with endpin out). It only gets changed if I lend the bass to some other player. So there is a significant length of endpin (steel, 8mm diameter) sticking out inside the bass (I guess it may be 15 to 20 cm). What is the influence of the inside part of the endpin on the sound of the bass? Would it be beneficial to the sound to cut (part of) the end pin, since I don't need the full length? Would there be some inconvenient of shortening the endpin (besides making it not possible to lend the bass to a taller player)? I would not like making such irreversible modification, if there is any chance that the sound gets degraded.