TREMOLO STOP is a contact pin based improvement integrated into the tremolo and/or its related parts, to adjustably make initial contact at initial position or at the zero point either in a fixed “hard stop” position that can be further adjusted to disengage from the body. The STABILIZER TUNER dynamic “soft stop” contact pin arrangement comprises a resilient element to provide a second variable force tension at the zero point of the tremolo. The contact pin is adjustable relative to the body. An adjustable stabilizer housing varies the second variable force of tension.