Wasteland Ghost said:
Yes, I know (even fixed a bug, which prevented them from leaving peacefully). But you have to remember: there is no strict sequence in solving the main quests in FO1. And such moments are designed to encourage players to choose different way next time. There are plenty of ways for playing FO1, that's why I love this game so much.
concerning the water chip quest, i dont consider it anymore longer as a true main quest, because its possible to finish the game even if you dont bring the water chip to vault 13. thats how my last run ended, ive just destoyed the military base and the cathedral... and was teleported to v13 to chat with the overseer...