^^^^THIS AU customs are tight yes, but impenetrable? No. If you follow some simple stealth and packaging rules and are willing to go that extra mile then you will be successful. Your biggest enemy is canine detection for small shipments of powders, if you are shipping mdma it will need to be crushed to powder too unless you have an ingenious method. Larger shipments are another issue altogether but some are getting through regularly, just look at the number of AU domestic vendors reselling product they bought on SR from o/s.