I had purchased a large one one time. I forgot where, it was shipped to me ROLLED UP!!! Can you belive that. I could not do anything with it. I called the company and they offered to send a new one. I said, I will shop else where, just give me a refund. They appologised up and down.
I ended up going to town and getting one in my local quilt shop!
I am a happy camper.
I have heard though, like the others, putting it out in the sun with something heavy on it. The gal that mentioned the ply wood sounds like a great idea.
Rememeber... No question is ever dumb!