Thanks coderus - at least I am/have been looking in the right place according to your reckoning

Perhaps I missed something. I played with one file, adjusted some figures and left myself with a flashing black and white screen - so I reinstalled Sailfish.

I'm looking again, now I've reinstalled all the required apps/dev mode/etc.
I thought maybe one of you guys might know directly - it's cool, I shall keep looking, any further input appreciated!

Regards,