The Sophia Stabilizer Plate, fiting between the spring block and the base plate, below the retainer spring pieces, is pre-tensioned between the tremolo block and the tremolo pocket face when the strings are at pitch, etc.....  has a stiffer feel so that when, once installed, and “seated”, there is  “firm soft stop” created [v. EVH hard stop], that fell/sounds much more like a hard tail but can vibrato around Zero Point, as well as provide reinfocement for double stops, etc.
The Sophia Stabilizer Plates require top-loading string installations.

• Pre-tensioned premium stainless steel

• Invisible, non-destructive installation

• Substantial improvement in sustain

• Capable of enforcing accurate returns from dive bombs

• Excellent for double stops

• Bending notes to stable pedal tones, etc....

• Low-cost -- no maintence required once installed

• Retro-fits Genuine Floyd Rose® Original Tremolo [OFR] or similar = 3 x .669 M5 Screw Pattern Compatible