Here's what I use/have. I started off with the hollow core door ($5 at Lowe's) and a couple of ceiling tiles ($2.25 each at Lowe's). I put the door on the top of a 6' folding table, and then I put the ceiling tile on top of that. I used that for a couple of planes. After that I took the ceiling tile off and just pushed the pins directly into the door. Good for a couple of more planes. Now I've given up on that and I've gone to a magnetic building system. Just like the cheap building board from Great Planes stay away from the magnetic system from Great Planes. There is nothing wrong with their system besides being too expensive. If you're interested in doing a magnetic board then check out Caffeenman's website [link]http://airfieldmodels.com/information_source/how_to_articles_for_model_builders/tools/magnetic_building_board/index.htm[/link]

I had to build my magnetic building system a little bit at a time, but trust me, it's worth every penny. After you build with it you will wonder how you ever got along without it.

Hope this helps.