"I am also burnt from other secondary listing experiences where the aussie share price fell badly behind the US share price due to overly low volume buying when sentiment drops"
This is of interest to me - how much was the difference, if you can recall - or can you cite the ASX code(s) and I can go back and do an exchange rate adjusted comparison to see.
APT Price at posting:
$68.69 Sentiment: Hold Disclosure: Held