The "redline" hulls did not have major problems with soft spots. They were built significantly lighter than the previous years, they are not quite as strong. They have been known to break off at the front beam, this is especially true if the anchor plates have not been upgraded.There is a patch thay can also be installed to streghten them more.
When you look at one of these boats, look for soft spots anywhere as you would with any other hobie. Look for major cracking around the front beam. Keep in mind that most boats will have cracks in the gelcoat in this area which is not a big deal.
2010 AHPC C2 #218