I just started a new build and have decided to skip the CA this time, mainly because of how my lungs feel after using it. I built one wing half of my Bel Air 40 over the weekend, and after trying rubber bands, barbell weights, etc., I went to Sears and found these:

They are about 3" long, cost $1.99 each, and have a ratchet clamping action. They are perfect for holding down the leading edge of wing sheeting, and then I put some 2 1/2 lb plates on the wing to hold down the trailing edge. I highly recommend them.

http://www.sears.com/shc/s/p_10153_1...y&sName=Clamps