Hey Bev! If you dont notice the scent, it could be candle nose....or allow the tart to cure a few days and test to see how the scent throw is .... Oh no , yeah you need a good working scale to get accurate measurements. Oh no suppliers in Australia?! Hmm....maybe there are people here from there that can help you. I think a lot of people here, have their supplies shipped from the United States. I get my scents all over, I have had lots of luck with many places...some are...Candle Science...Millcreek....there are others. Maybe when you are able to search the classifieds, someone may be selling a good fragrance oil lot, and it would give you a good chance to test different oils from different suppliers. Wheww just realized I wrote a novel Hope this helps some, Jessica