Here's a shot of how the oil system finally ended up. Please ignore the temporary plastic primer lines and other no-no's in this photo, as much of this stuff changed before first flight. If you look where the stock oil filter used to be, you can see a blue AN-6 fitting connected to an Earl's "Pro-lite" hose. I bandsawed the filter mount off and used the one closest to the fuel pump as the oil outlet from the engine, and welded the other one up (although you could use it as an oil return). The port that feeds this hose used to run to the filter (from the oil pump), but now runs to the filter and cooler, and includes a thermostatic bypass on the way to the cooler. The return from all of that stuff re-enters the case via what was formerly the oil cooler return port. This retains the filter bypass, and adds thermostatic control sandwiched between adapter and filter for more rapid engine warming from a cold start. These inlet and outlet passages are connected inside the case, but I had to do my homework and trace the system to prove to myself that it would work. One of the oil cooler ports is now blocked off, using only the lower port that returns oil to the case. You can barely see the blue fitting hiding to the left of the starter, down below the square NPT plug. This oil system is now officially "flight tested", as I have 75 hours on it at this point.
