CR-10 Foam Foot

This is a foot to put some foam inside with 15mm thickness or more.
Its a noisekiller for the vibrations of the steppers.
I designed this thing, because i have a lot of foam.
Feet with squash balls do the same job.
Maybe for some persons its the easier way too.
You will need some countersunks M4x8mm.
You need only 1 per foot.