Become BOS Sentinel but NOT destroy the RailRoad

[ERR_NAME_NOT_RESOLVED]

Hello fellow vault dwellers,

I really want to finish the game with the Brotherhood and become Sentitnel.
But I do not want to destroy the RailRoad by all means.
When I was searching the wiki, I' ve read that some quests even each other out.
For example, if you complete Ad Victoriam when Defend the Castle is active you will complete both, but by completing Defend the Castle you automaticly fail Tactical Thinking. That way you won't destroy the RailRoad, when i do this, can I still complete the Brotherhood questline?

If you are still getting what I am trying to say, I really want to know before I progress further.
Thanks in advance!

[Zombified]

Pretty sure you HAVE to do tactical Thinking to further the BoS main quest.

http://fallout.wikia.com/wiki/Tactical_Thinking gives the flow of them.

Defend the castle is completed by these because its part of the MM main quest im assuming and therefor once you get to the same point on another faction it cancels it (just guessing)

EDIT: With console commands ->

It's possible to skip this quest and still complete the Brotherhood quest line, leaving both factions alive. Once this quest is acquired, before speaking to Kells, players can complete the Institute quest line up to Mass Fusion and then choose to 'Inform the Brotherhood' by speaking to Ingram when the time comes. This will automatically start Spoils of War while leaving the Railroad alive. Tactical Thinking will remain incomplete in the quest log, and players will want to avoid Kells whenever he attempts to initiate dialogue, but this tactic will allow access to the repeatable Railroad quests in the endgame.

Ingram will normally not talk to a player while Tactical Thinking is active-- she'll just direct players to speak to Kells. PC players can use the console command "setstage fdc8c 0" to work around this by starting Spoils of War. Tactical Thinking will be automatically completed and you will be teleported to Ingram to start the next quest (Spoils of War). The Railroad will remain intact and friendly to the player but since this isn't intended there is a chance that on completion of the main quest line, Desdemona will have no dialogue options.
Alternatively, while the quest is active, one can use the command "setstage 00107a1c 255" to advance the quest to completion, without locking Kell's dialogue options into referencing this quest for the remainder of the game. His dialogue should return to normal, allowing the player to receive Leading by Example missions from him once more, without the need to become enemies with the Railroad.

This method also has the seemingly added benefit of repairing Desdemona's end-game dialogue, even allowing the player to partake in To the Mattresses missions.

[Max]

Side with minutemen if you want both Brotherhood of Steel and Railroad alive.

[Zxzxx]

You can not reach the rank of Sentinel without doing all the BOS quests. Defend the Castle is the point of no return for the Minutemen so you will not be able to do the BOS quests. Apparently you were going to be able to still reach the rank of Sentinel with the Minutemen ending but it was cut out for some reason.
https://www.youtube.com/watch?v=cTvJHimXns0

[Bored Peon]

Originally posted by United States of America:

. Apparently you were going to be able to still reach the rank of Sentinel with the Minutemen ending but it was cut out for some reason.

It was probably cut out when they cut out you being Elder.

[Ecktos]

The only way to do this is to use console commands.

[ERR_NAME_NOT_RESOLVED]

Thank you all for your reaction.
Guess I am destroying the RailRoad...

Have a nice week everyone!

[Yhwach]

Originally posted by Arkham Knight:

Thank you all for your reaction.
Guess I am destroying the RailRoad...

Have a nice week everyone!

Have fun blowing the S.S Compensation out of the sky

[ERR_NAME_NOT_RESOLVED]

Originally posted by Scarecrow:

Originally posted by Arkham Knight:

Thank you all for your reaction.
Guess I am destroying the RailRoad...

Have a nice week everyone!

Have fun blowing the S.S Compensation out of the sky

Thanks!