Thanks big browna. That makes me feel better. Seems like your time line should match mine.
Ozziejim, it took exactly a week from sending my ARN application for me to receive the letter from CASA with my ARN. My advice is to wait until you get your ARN before you get the medical underway. it just makes all the paperwork easier, especially considering the turnaround from CASA was so good (I went through the ARN process earlier this month).