I have been lusting after one for quite some time now. They're NOT cheap.
For those who are unfamiliar with the Steady Betty, it's a kind of foam that does not melt when heat is applied, and is not slippery, so when you press seams on a block, the block does not move. I've seen the foam made into ironing boards and pressing surfaces in different sizes, and even bands that go around your hands to help you quilt.
[img]
https://www.kqimageserver.com/kqimages/parts/9004.JPG]
https://www.kqimageserver.com/kqimages/parts/9004.JPG[/url][/img]