RE: 72 mhz still ok?
I would add though to go over that radio system with a fine tooth comb. Make sure all of your batteries check to rated capacity tx and rx. Do range checks for all of your planes before flying. Make sure all servos move smoothly with no intermittent problems.
Also might not be a bad idea to send system to Radio South for a checkup, though if your range checks are ok you are probably fine.
Good luck.