Definitely looking great.
Just leave the car in the sun for a few hours - gentle warmth required.
Having done my own full bare shell rebuild, and the headlining too, I'd say that was the worst/scariest job in the whole lot. Almost anything else is recoverable if you muck it up. Cutting the headliner for stretching it - once only ever - is of course not recoverable in the case of mishaps.
Congrats, keep up the good work.
p.s. Could you pls report back on the distance rearwards from door shut of the leading edge of the fake vents. My set on the shelf is getting restless....