Oracle:
CASA has its finger in the pie right now trying to stop owner maintenance despite the fact there is not an iota of evidence that owner maintenance has caused an accident.
1. There is no evidence because ATSB doesn't investigate ultralight accidents.
2. The recent groundings of sections of the RAA fleet over such things as non standard propellers and suchlike indicate that RAA members are not familiar with the term : "approved data" or the word "approval".
Perhaps the RAA needs to run maintenance procedure courses like SAAA.
3. As for access to controlled Airspace, tell 'em they'r dreamin'.
Still, there are some very nice light aircraft being produced these days, the only concern I have about some of them is ruggedness.