I think your theory is solid and that it is certainly possible that old missiles can be use for launch vehicles, but nothing else fits the context that q dropped that this was not planned and was not the good guys.
You also have the Trump tweet from June 11th Notice the two misspelled words; Missile and Stopped, there are no coincidences....
(2) MISSILE FIRES W/ A STRATEGIC PURPOSE
(2) EXTINGUISHED.
THIS IS NOT A GAME.
THIS IS WAR.
MISSILE.
MISSLE.
FOX THREE.
SPLASH.
This is not a game.
Certain events were not suppose to take place.
Q
1475
Jun 12 2018 15:55:46 (EST)
FOX M1 STOLEN TAKEDOWN
Donald J. Trump
Verified account
@realDonaldTrump
Jun 11
The fact that I am having a meeting is a major loss for the U.S., say the haters & losers. We have our hostages, testing, research and all missle launches have stoped, and these pundits, who have called me wrong from the beginning, have nothing else they can say! We will be fine!
Q
Certainly you could be right. But consider this, what if the Puget sound misled was the response to the unexpected events, not the unexpected events.