Hi Joel, Im a commercial helicopter pilot and have to maintain a Class 1 medical certificate, this is done every 12 months. As a young bloke you shouldn't have too much trouble, unless you can't hear or see too well.
In fact I think the opthalmic test for eyes has been dropped, as it isn't required under ICAO (international) licencing.
A medical takes about 30-40 mins includes a general run over your body, reflexes, stretching, read the eye chart, colour blind chart, height, weight etc.
Every couple of years depending on your age you need to do a audiogram to check the heart.
Generally costs around $110-130 depending what has to be done, then CASA charge $130 for processing.
Always appears to me to be a stressfull job as an ATC, but wish you all the all the best.
