I regret selling my 2 ropeman 1's as I wanted all my gear to be within spec. However, the shwabisch and tender as seen in picture has been a giant nightmare to tend slack so Im going back to out of spec equipment for ease of use. I just received a kong duck but it doesnt seem to accept any of the 5 different carabiners I have. What carabiner is compatible with the kong duck as it seems it cant round the corner of any of the styles of carabiners I have. Wishing i went back to ropeman 1 but want to use this tether that is too big for rm1.