That is an impressive graft mbndupuy! Good save!
dropofrain, if it were mine, I would feel the cutting and cut off the rotting part, to try and save the rest. One of the things I have learned with cuttings. callus the cut off part, plant in a well draining media, water thoroughly the first time and leave it alone in part shade and warm area. The shade part is important, the plant is still acclimating. Till I see at least one fully opened leaf will I resume watering again. Sometimes some cuttings just take much longer to root. I know Nevada heat and temps are much more intense and drier than ours, so be very careful that it does not bake in heat. Plants will normally shut down further when temps are soaring to triple digits, so it will take its time and wait till temps are much better like in the low to mid 80's range before it resumes growing again.
