Interestingly enough the tail pipe flap can be actuated with GT1, but Autologic doesn't cover it!

"It is not one of our priorities, due to the simplicity of testing it via more conventional methods" was the explanation I was given when I raised the topic with Autologic.

To be fair, they are right.

I run one of these myself & this flap serves very little purpose in my opinion. the flap on my own car played up for a while. I played around with various things & came to the conclusion that it was best left permanently open.