Peter wrote:
But there are others, some of which ignore requests for blocking.
Would be nice to know which ones don’t!
I suggest posting that question in that thread.
On the Viper topic, one could settle this question by looking at the panel of the Viper. It is parked in the hangar there. I could have done it but didn’t think of it 
My view is that it probably does not fly these days, but did that one flight, and nobody who knows wants to talk about when that took place.
