I'm restoring an old Graflok back. Cleaning, painting, new GG, etc. The one thing I've noticed is that when the GG section is slid in it has a bit of movement. Probably 1 or 1.5mm, fore and aft, which would affect focus. Visually the springs look OK and the chrome arms aren't bent. Are the springs just weak from age? What would be a good fix for this other than buying another back or springs (if they can even be found)?
Thanks for any suggestions,