Hint: Try and get a medical as searching as the Med Certificate, and then get the Doctor(s) to certify in writing that you are fit to operate heavy machinery for less than 90+130 = $220.
Have a mate whose heart problems were picked up at his medical. Triple bypass at the Alfred three days later.
CASA biannual medical is good value (110 per annum) just on the basis of what they pick up even if you don't fly