Here are additional facts on automated emulsion making.
Emulsions with mixed halides generally end up with banding unless the addition of both halides is carefully controlled. You have missed this point totally, I think.
If you add silver, and then a bromoioide, it bands if the halide is controlling. Kodak had many solutions to this.
If you put the iodide into the kettle, it ends up all in the center and must be 'churned' to the surface by using ammonia or other silver halide solvents (Kodak had 2 unique solutions to this problem)
If you make a bromoiodide that is not banded or core shell or 'converted' you must have a smooth addition of silver and iodide, with bromide doing the controlling. This is a key to this type of making. Agfa used methods very old compared to those used by Kodak. I know nothing about the Ilford methods.
Pulsations introduced by pumps must either be minimized, evened out or eliminated by some means. Elimination is possible as noted by Peter in his exellent post, by several means. We used some of these, but there are many more of them that can and must be used, especially at smaller scale.
This is why I have said it can be done, but is expensive and time consuming. Ryuji has posted elsewhere that he is doing automated precipitation but when I asked him to post examples, he appears to have refused and may now be ignoring my posts completely.
I have offered publicly and privately to work with him, but he has refused my offers in the strongest terms in all instances.
I believe that both of us together may be able to offer a good, workable automated method of making monodisperse emulsions or t-grains for about $5000 in equipment. It is possible. I am also willing to work with anyone else on a 1:1 basis.
In the mean time, I continue to stress that older emulsions from the 20s to the 40s or 50s are more in keeping with what the average hobbyist might attempt, but advanced experimenters can move beyond this. I continue to be willing to help, but caution you that use of automation is a difficult road. I am willing to help anyone, but if they ignore my help, suggestions, or consider me unable to 'produce' I will be unable to help you all in the long run. I cannot do all of this myself.
Pursuant to this, I have mentioned before, I am willing to develop a workshop covering these advanced topics, but due to the limited interest in even the fundamental workshop, I am not willing to go ahead with the 'advanced' version. This is all very expensive when one considers the cost of just the silver involved.
Someone jokingly said to me that if one more major B&W producer quits making film or paper, people will beat a path to my door. I don't expect that to be true as by that time, I will be long gone - hoping for a long lifetime for analog photography.
But, in the mean-time, I will do what I can.
Now, for a specific hint. If you want to automate, and if pulsations are a problem, a very narrow inlet orifice with back pressure minimizes the pulsations. HINT:HINT:HINT..... You go from there.
PE