Do not use the word cycled then. Use halfcycled or whatever. You are not the one change the scientific nomenclature. Nitrification is completed (cycled) when both step works more or less seamless. Not you - not Randy - not me can say which concentration of nitrite create chronic or sub-lethal damage. We can say from those organisms that are tested at which concentrations 50 % is dead and there is a large variation between tested animals. Many says it cruel to use a fish - as I do - in a controlled cycling of the nitrification process but do not hesitate an inch to recommend people to through in fish in high nitrite concentrations. They will probably not die but we do not know what happens after that. IMO - this is very bad husbandry. Either do the start with low addition of ammonia or do not put in fish before NO2 is close to zero.Hi Lasse the goal will be to fully cycle both ammonia and nitrites back to 0.
However I may be using Randy's graphs as safeguards to determine whether of not its safe to throw a cpl critters in along the way. He's done the work and feel like we can safely and responsibly work inside of his work here.
You can use the pope as your safeguard if you want - it does not matter for me. In your case with instant cycle - is not anything more than a normal transition of biofilms from one aquarium to another. First time I did that was back in 1973 - rather old method with other words. To recommend people that they are safe when nitrite is high or to recommend people that starts with (or add) 2- 10 ppm ammonia not to measure nitrite is IMO reckless. To advocate your self - you say that ammonia is not a problem because seneye shows much lower concentrations without saying that API and other tests for total ammonia shows the sum of NH4 and NH3 - Seneye - that´s is a hobby test too - shows only the toxic form NH3 which is between 5 - 15 % (in the 8 - 8.5 pH span) of the total ammonia
Sincerely Lasse