Gear Ties are fantastic. We use them on the refer and cabinets that like to come open during fun trips on our smooth roads.
The wife puts some small pillows in some of the cabinets with heavy dishes and of course uses the refer spring loaded rods inside when traveling.
To add to the sound comfort we have felt type snow flake shaped pads that sit between pots and pans.
Rolled up area rugs keep other cabinets in place.
No modification required on refer and no danger of damage with the Gear Ties. They are not cheap but sure do a great job.