How did you manage the IDLE-switch? Because, I do not have any button, switch or something similar I can use or push to go from the JFS to idle.. and back zu the cutoff. And I did not find any option in DCS to set such a pint. Just by moving? And can you share you axis-setup?
I did it with a Type 6 axis programming in Foxy:
rem For below idle to start and shut the engine
THR 6 1 (0 12) Start_single_engine Shut_single_engine
where
Start_single_engine = {RSHF HOME}
Shut_single_engine = {RSHF END}
works fine on my end