I agree with all the "you won't make it" comments above. You should call and get a better return if there is one available and before calling do the research yourself and have the flights in front of you when you call. They will usually put you on the requested flight

Re: TSA PreCheck. Maybe we are just lucky but we have always had precheck on our boarding passes for US airports that participate....but..we have had a precheck scan not read a couple of times and were sent back to the regular line