Ripper! Thanks so much for those, effectively you've doubled my RMAF Chipmunk photos.
Here's mine:
This is the true FM1022, not the pretend FM1022 now in the RMAF Museum. I'm pretty sure this photo was taken at Sempang, but note how the star virtually has disappeared from the square background here too. I can't see any evidence of an underwing serial here, but it would be nice to be sure.
This is for a current re-paint project (the real FM1022). Photos later.
Thanks again, I42, very much appreciated.