Read the first post by @Nutterbuster . The Kong Duck and CT RollNLock are of similar design and would likely have the same results.Ropeman 1 Failure
I don't wanna stir worms, but I do just want to stick this info out there while I have it. This is a link to the oft-referenced article about how a ropeman 1 fails, and a screenshot of the most relevant page I found. http://www.hse.gov.uk/research/crr_pdf/2001/crr01364.pdf Not saying use it or...saddlehunter.com
This discussion can be brought up many times, and safety IS a big concern, so I'm not saying it should not be a prominent point... This is why I stated that it is up to the individual to decide what they're will to accept as the risk percentage. It typically takes +4kN to stress an ascender enough to strip a rope sheath, and the typical fall (if you are unlucky enough) as a saddle hunter should not generate more than 1-2kN; unless a ton of slack is induced (improper procedure for the devices discussed) or your tether is not fully secure. I'm not negating the use of friction hitch, as I do use them in other venues, and have been reconsidering them as part of my current setup (not because I personally am uncomfortable with the CT devices). That being said, any fall that results in you safely reaching the ground, means that you need to discard and replace any piece of gear that was part of the load-bearing system that caught you, whether or not it looks "fine".
I digress... Back to the OP's topic. I do use Oplux for packability, but I do use 9mm Canyon C-IV for my SRT and rappelling techniques for saddle hunting, and the new Canyon Elite looks awesome (just haven't bought any yet).