If you have not tried building with magnets, I think you are missing out on a a great and easy way to build. I have built barn door, tapered and double tapered wings on this board. Box fuselages are also a dream to build on a magnetic building board. I have posted some pictures of my latest build of Mike Pratt's Primary Force wing in THE BUILDING TECHNIQUES section. This wing is a type of I beam construction and with the tabs on the bottoms of the ribs, the magnets firmly hold the ribs in place exactly at a 90 degree angle to the building surface so you can easily insert the leading edge and trailing edge piece in place.
Click on this link to go to building thread
http://stunthanger.com/smf/building-techniques/using-a-magnetic-building-board/Give it a try, I think you will like it. Look ma, no pins.
Mike