Set Start times

Similar to another post but a bit more in depth since I don’t want to miss Arms Length. Doors at the show I’m going to opens at 6 with show starting at 7. I would assume that’s when anxious starts. I’m told HM would start at 930, so question: when does Arms Length go on assuming their 2nd in the show as I understand they typically are. When does the 3rd act typically start?

Any help would be appreciated!