I have two of these that clamp together, I then put a
GW battlemat on them for fantasy and turn it over to the black side for
40k. Couple of eyelets in each corner pulls it tight over the tables et voila... Perfectly flat surface to game on and portable. Can be setup in minutes and taken down just as quick. The legs store in the table so no lugging them about and if I want to game outside for the 1 day in the year it's sunny in the
UK I can... even had a BBQ going whilst gaming with my m8s. Bliss
http://www.decorating-supplies.co.uk/Harris-Versa-Table-Paste-Table