- you can easily cut it with a carpet knife for a very custom fit
- it absorbs lots of shock
- it can take a pretty hefty blow from a sharp object without penetration
- you can "hot glue" it in order to build a custom shape
- It's really cheap
You can go with a 1" thickness, but it's overkill
Use a two-ply cardboard box to start - then hot-glue one layer of 1/2 inch of "pink:" to sides and bottom. Double up to 1" if you think you'll need it
Cut "Pink" spacers to prevent table from moving in the box
Put a small piece of "Pink" under the cartridge end of the arm and tape in place for support and prevent the arm from moving intransit.
Make sure the platter is secure
Good Luck - Steve