A large Steady Betty!!!! This is a board with a foam wrap and then a cover that is "sticky" to fabric--like an enhanced flannel. It certain holds items in place. The HUGE problem is the surface is so soft from the foam that the seam that you press doesn't lay down after pressing. I was pressing some HST and the top flap of the HST floated up in the air at least a few inches. Nothing presses flat at all.
I have been pressing on a board wrapped with a folded flat sheet (so about 8 layers of a high quality cotton bed sheet) and this gives me a very nice pressed seam. I bought the Steady Betty online from JoAnns and I think the return shipping is going to be so much I might not even return it.