Looked at flow, pressures inside the mill, found proper geometry for the outlet, and switched to a lawn mower style blade which did not require pillow block bearings and ran with a smaller motor. Example of a woman who would not sell all her tomatoes to one person, because then she would have nothing left to sell. How to read people s desires and help them develop appropriate technology to solve for those needs. How to explain to future builder that the placement of the hole was important. Problem of confusing mechanical failure with technical failure, if plans are not clear.
Some people prefer to learn by show and tell, others by reading.
In any case, good to leave room for future improvements. It is indeed hard to design appropriate solutions sitting at MIT in Cambridge without exposure on the field. The best way to learn in our context at MIT is to listen to people who have been in the field and done it before.