Yes i also think that this is my problem.
100C looks very low to my eyes for gas shut off temperature.
The Fadec manual says 400C (100*4) which looks about right.
I use a propane blow torch bottle (US imported) which says
propadiene something. (they use the chemical term rather than plain language)
You have mentioned about the gas. I think this may be your problem. Connect direct and only close once at idle.
Thats exactly what i did in the initial succesfull attempts.
Chris