Hi JJ,
The system now flows at 4.5 GPM with cold oil through the 1 micron filter so I do not see any advantage to going to a true bypass (parallel) situation unless I am missing something. I think bypass is normally used where the smaller filter can not withstand the flow or pressure or where there is concern that the filter may clog and prevent flow. The latter is why I installed the adjustable bypass for safety - I do not have to worry about keeping an engine lubricated, etc. but just have to worry about the pressure getting higher than I would like. The 10 micron filter is probably unnecessary given the large size of the micron filter but they are relatively cheap so I figured I might as well.
I debated with myself on how to best locate the tank supply and return. I was concerned about the seat getting in the way of removing the magnets since they are 10 1/2 long. I originally had it designed with 2 3/8" holes in the cover and so the seat interference would have been a real issue. I changed the design to 3" holes (magnets are 2") so now the magnets can be tilted more while removing them. That would allow me to rotate the cover 180 degrees and put the return and supply closer to the rear of the tank, separating them further than they are now. I also thought about the heights like you recommended. Seeing so much glop on the bottom of my tank, I thought it might be best to try to filter out anything that is trying to settle out. I was hoping that the 45 degree elbows I put at the ends which are directed sort of towards the rear corners would also create a turnover top to bottom within each tank. When the filtering system was running, I could see surface flow in the top layer of oil through the fill cutout but it was hard to tell how well it was turning over. I thought I would use the PT for a little while and then remove one magnet to see if there are any filings attached. While the magnet was removed, I figured I would run the filter system. If I remembered which I doubt I will, I could put a little hydraulic dye in the oil in the filter hose leading to the filter cart and then see how well it mixes when it flows into the tank. If the mixing is poor, I will do as you suggest and see if that is any better.
I am certainly open to suggestions since I know nothing about this stuff (the only thing I am good at is worrying hence the magnets and filter system!) and so I really appreciated your input not to mention all of your prior posts!
Ken