Thanks for that, you've made an old man happy, At least I had the time to get my inlet temperature gauge working so I wasn't idle. And, I realised I have forgot to model the standby compass, it's normally folded backwards when on the ground so I missed it. Something else to add to the smaller "to do' list
I had tried the very same as you instructed, with one slight difference. As I was using the example of a binary input I only used one input_active as they were both using the same FireTest in the controls.tmd file.