Hal
That provision for external
oil pressure adjustment is neat.
Mine has a similiar device...one that Joe Boghosian (my engine builder) has been putting on his motors for about thirty years. His involves an
oil line from the back of the motor back down to the Aviad near the fitting for the puke tank return tube. The line has a fitting that regulates the
oil pressure. Really nice and easy for fine tuning once a motor is run in.
Can't figure out why these things aren't more common.