Yeah, I heard you have to clear CTC in one shot. so better to go through CTC course (QAC) I heard that will help a lot for CTC exam.
I'm also waiting QAC to conduct Avionics CTC course since last year. I gave a call to them, but they r not conducting any Avionics CTC course for 2009. So if anyone has gone through that course, please suggest me too.