I just got the HH last week and put a few good climbs on it. For some reason, I can't seem to dial in the hitch length. It is either so tight that it is impossible to tend, or almost perfect, but with some creep with 100% of weight on line. Is the knot really that finicky that a few mm difference will cause that creep?
I also tried to set up a 3:1 system, using a petzl basic with a carabiner but without a pulley below the HH. It would not advance at all. Are pulleys a necessity for 3:1?