I suggest you speak with Beautiful first and see if you guys can come to a compromise. Even if they pushed their enter time up another 30 minutes you'd have to be out of the zone in 3 hours. Again I urge you to communicate with each other. It may not be an issue with the 7/24 run but keep in mind the 7/31 run there is a group that follow TuwileNightStar (xXMutinyXx) which will create yet another conflict. My part in this is done. You guys find some way to work it out.
Erebus is going to modify their schedule and change the 24th to Jeuno, and the 31st to Bastok (assuming the brewing plans of a possible joint run don't work out).