Two of my three Lugers have "loose" grips.
One a 1940 42 with wood grip panels
The other
A "Black Widow"
In both cases the grips:
Fit Flat
No cracks or chips
Screws go down correctly
They are just "loose"
They slide back and forth at the top
What is the secret to making them sit still
Gromets
Washers
Vasaline
Give me a hint