I understand, Ron
The process machinery you describe simply scales the basic process things up. The basic scheme remains the same. But the scaling up is almost always a non-trivial excercise, as this engineer is well aware of.
It is always interesting to hear how it has ben done, though. I understand the doctor blade and granite slabs will be the route of choice for most home workers.. This is a bit too big for my present darkroom. I am presently trying to figure out how to take over the adjacent laundry room without having to do all of the laundry. One option is to relocate the laundry to the second floor, but that is not a step I am ready to raise with my wife just yet.