Hi Koot.
Firstly the MOGAS will be great and I am sure there will be much support! The Rotax 503 and 582 engines will run on 93 / 95 and AVGAS.
A Jabiru engine is rated to run on AVGAS and MOGAS with at least a 90 (Nock Rating I think it is called, will check my wording and confirm). In South Africa the 95 octane fuel has that rating of 90.....
So to accomodate everyone I recommend that we buy 95 octane and then all Rotax and Jabiru engines can run it.