Hi.
After any comments from people who have used one in a teaching environment.
Plus would anyone with the skills and materials like to help develop a double rope version? My logic being double ropes are even harder for the beginner (and such a device would allow safe practice) , in an instructing setting there are often two seconds (one on each rope). I often get both to belay (one on each rope), this would allow more realistic double rope practice.
Thanks!