What fun! I need to make some for machines. I also think when I have some spare time I'm going to sew up some little pads to slip underneath the pressed foot. I think it was you who said you did that.
I'll need a few but I can use my scraps of fabric which will be perfect. I also started unstitching a failed project that works as a slip cover for my featherweights bed. So I'm undoing the seams and cutting it down to size and re-sewing it!!
should work great.