The CTP course is really laid back, you show up and take it in, and then go to your hotel and study sheppard air. I took the written 3 days after CTP on a Friday and then started ground school the Monday after that. It's a little optimistic to get in that September 19 class with the September 10 CTP because CTP is 4 days of class and 3 days of sim. the problem is they only have 5 sims and usually 30 to a class, so some do sims the day after the ground and others had 3 days off before starting sims, so if you were scheduled with the days off you wouldn't be able to get in the September 19 ground school. My reccomendation is get in the CTP before September 10. Oh and do yourself a favor and pick up sheppard air now and begin the studying.