I built the same magnetic building system from Airfield Models and it's the best thing I have ever done as far as building. I love it. I'll never push another pin. If anybody is thinks that they are going to build more than a couple of planes then this system is well worth the money and time to set up.

You can see a lot of "in action" pictures of my magnetic system on my LT-40 PIF build thread. You can find that here:
[link=http://www.rcuniverse.com/forum/m_3439708/tm.htm]Pay It Forward Build Thread!! Sig LT-40 build[/link]

Ken