Hi Bernie,
There is a red RV4 from Melbourne registered single seat in RAA.
Being carefull with the build (weight wise) 3's 4's and 6's could make the weight but they would need to be light to make the required stall speed, where as the 9 has a different wing and has no problem with the stall speed but has to be built ultra light to meet the weight requirment.
Bob Dennis
0-235 RV9a (406 kg)