Hockey puck leveling feet.
 

I made some cheap leveling feet for my MM....they are made from used hockey pucks:D They are very robust and should work good on the MM.

To make them you simply drill a 1/2" (M12) hole in the center of a hockey puck, then counterbore the hole just big enough to fit the head of your leveling bolt. Only took about 1/2 hour to make.

Wayne