CMH, They broke at the nipple. After a couple of brakes they just retensioned them and I still broke a spoke. Since the complete rebuild I haven't had any issues thus far this season and i'm logging some good miles. I'll keep you posted. Assuming no more broken spokes I love the wheels. I've got I9 hubs which are super nice.
On an additional note i'll be building a fattie for my buddy soon and will keep everyone posted w/ details when that goes down.