After using a number of devices to process my 4x5 sheets, I've come to the conclusion that the best processing device is that which allows me to process film using the least amount of chemistry. At present, I am using one of those nikor tanks that is capable of handling 12 sheets at a time. I like it, the downside is that it uses one liter of chemistry to do 12 or fewer sheets. What I'm looking for is some kind of device that comes in two sizes, one for small batches (6 sheets or fewer) and one for larger batches (over 6 sheets) that uses the least amount of chemistry. Does such a thing exists or is this just wishful thinking?

Thanks.