this a new OOB technique?

Instead of the player clipping a la Advanced Cube Mechanics seems like you can essentially peek and shoot portals OOB with the cube drop (if well-positioned). Works on other areas with a similarly thin roof. The black cube is houses the level transition trigger and the crouch save loads clip you in.

Minus my screw ups + long set up, this should save at least a minute in control room. How would this fit in with the categories currently, given control room from there is just a wait sequence?

this is awesome. do you need to peek the portal or can you just end up on the ceiling?

Nice find.

To answer your second question. That would be an any% only strat since you're leaving the map boundaries