Because of the cost of gold, these springs are standard only on the more expensive instruments. On most other instruments, the makers use stainless
steel. The stainless steel is reliable has a decent feel, but the feel of the gold springs is superior. Gold springs can be adjusted to a lighter tension and still behave as a spring should. They offer the same resistance throughout the range of motion. With a stainless steel spring, the resistance increases. We can install gold springs on any model at your request (and at your expense).