I lost the yoke screw for my S&W M25-5 and ordered a new one. The new yoke screw is too long. When it is tightened down the cylinder will not open. My question is do I just file the end of the screw until the cylinder functions properly? The reason I ask is because I will change the shape of the end of the screw if I file it. This sounds like a stupid question even to me but....... Doc