Castle Rock studio has already been debunked in many ways, the holes in the wall were merely power access panels, the light reflections were present when Trump was in the office, the wallpaper was changed during trumps presidency, and the "diet coke" button is wireless(now back on the table)

Q's Castle Rock is most likely referring to the city in Colorado near a military base that was having unusual police activity yesterday without explanation.

https://www.msn.com/en-us/travel/news/heavy-police-presence-in-castle-rock-tuesday-night-as-authorities-shut-down-founders-parkway-overpass-near-the-outlets/ar-BB1d7V2J