Following on from (1) & the tin wall grows, grows . . . progressing along the wall
Indeed one must consider power points/outlets.
After the tin square is cut I carefully measure & cut out the spots for the electrical outlets. Yes, the hole is made before I attach the tin sheet to the wall.
Basically, I measure distances on the gyprock, scribble them down, then transfer them to the tin square. Easy. Obviously, accuracy in measurements is critical for these cut-outs. You can’t make a mistake such as making the hole too large. It’s not so bad if the hole is too small as you can cut out more.
Evening views as the tin wall grows . . . and grows