Low C Key Bounce:
On many saxophones the G-Sharp and Low C keys tend to bounce. The reason for this many times is the spring placement. The spring is right near the rod of the key and this allows the key to bounce unless it has a lot of tension on the spring. Not enjoyable to play with this tension.
This photo shows the traditional placement for the Low C spring.
By making a slight grove further out on the key the bounce can be made less and still have a spring tension that is usable. It does not weaken the key and allows the response time of the Low C key to be improved. I also used a stainless steel spring to help with the bounce because they tend to bounce less.
This photo shows the spring placement.
Very easy fix……