I bought 2 Krypt racks for my older tower. The racks came, and they were very solid. I only purchased one, and once I received it, I had to order another. Cant beat the price (check ebay).
I ended up getting a Krypt Tower(swoop). The tower is sick and the wakeboard racks are sweet!
Bullet Lines sales the Krypt racks.
Bullet Lines customer service: My old tower was 1.5", the new tower was 2". My clamps were too small for the new tower. I sent back the 1.5" clamps and they sent me the 2" clamps. I only paid $10 for shipping on my side to get the smaller clamps back to them. In 5 days I received the 2" clamps. Very happy.