Just spoke to register which is 5 mins from where i live to see how quickly options can be converted and it seems that you would do well to get them cleared in 3 days. Money has to clear after the register is paid to ksx bank account (2-3 days clearance), then they give permission to register which may be an overnight process.
www.securitytransfer.com.au (not computershare as it says in company details).
KSX Price at posting:
0.0¢ Sentiment: Buy Disclosure: Held