Here is everyone’s solution
4 curtain rings
4 racquetballs
2x3 slab of granite counter top
1)place rings down in a square
2) put balls in rings
3) place granite slab on racquetballs
Done! No vibration
4 curtain rings
4 racquetballs
2x3 slab of granite counter top
1)place rings down in a square
2) put balls in rings
3) place granite slab on racquetballs
Done! No vibration