I think the 1st generation didn’t have the hard piece of rubber in it to hold the carabiner in place. On the first model carabiner turned sideways I think.I got mine after they added that. I generally have always waited a year or so before buying any first ever product like that.
I am getting back into tree climbing. Used to love climbing.Climbed full time for 10 years,started my own business had that for 5 years and somewhere along the line it went from something I looked forward to doing to just a business.Sold the company and after a couple years getting the itch...