Paul,
          Just setting up the oil filler to find the factory set up is
very complicated, which is easily by passed. That leaves the question of
a breather.  What have others done?? I am tempted to simply put a
breather pipe into the intake somewhere.   Neil.

Well Tracy had to build an air oil separator because he modified the RX8 center housing.  I think feeding it into the intake manifold is OK.

The rotary does not use a lot of oil if you mix 2 cycle oil with the fuel.
In fact some survives and make its way to the oil pan increasing the volume of oil in the pan. Therefore I would change the oil about every 50 hours.

Paul Lamar