Jabiru's are prone to blow oil out the vent pipe especially if overfilled, to contain this a two bottle system was found to work best.
Pipe from vent enters one side of bottle on firewall, a further pipe then leaves this on other side to second bottle shown on bottom left.
IMPORTANT First bottle is sealed and contains no vent holes. Second bottle has vent holes around the neck, make sure the pipe is further in than the level of the holes.
Also in the first bottle, cut the ends of the pipes at an angle and not facing each other so the venting air, dos'nt have an easy escape, this should help drop off any surplus oil.