Here are some photos of me running the Class IV Tanners Boof on the Talullah Gorge in Georgia. It is a 7 foot vertical drop! As you can see I ran it cleanly. I've got to tell you how much I love my S12! It allows me to run rivers that I would never consider running in a hard shell whitewater canoe. I have much more confidence, and the self bailing system is great. I paddle all over the Southeast with my S12, and I regularly run the section 4 of the Chattooga, plus a lot of small steep creeks around here.