Very good write up on the actual cutting up of the donor branch for cloning. That is the most overlooked part of the process and seems to never have details. I use your exact method except I run DWC so I just soak rockwool cubes to place the clones in. I just some them in some weak nutrient solution at 5.5pH, then water when they are feeling dry on the outside. This plus the humidity dome gives me roots coming out of the cubes in ~12 days, so I assume the clone itself shoots roots a few days prior.
I would recommend anyone using a hydro method for growing to use the cubes for cloning so they can be easily planted into a net pot with clay pellets. The cube gives some structure to help hold the plant upright as well when it gets bigger.
I've even cloned donor plants that were root bound with hardened red stems, they just take longer. No cloning gel needed, that stuff is useless. I seem to do better without it. But I also found hydro to be 10x easier than soil growing, so maybe its me :p Either way, saves money and time.