are the mats on the website solid? Or can I roll them up easily for storage? I ask because I usually play at my local game shop and it would be a pain to even try to bring a giant hard board there every time, but at the same time the tables aren't that large (though they have plywood I can easily lay down) Also if they easily rolled up, to they start to curve at the ends if you roll them up?
Thanks for the info on the astroid, I'll probably run out tomorrow to get some sponges! They're just regular yellow sponge with black spray paint right? Any special molding technique?