This isn't an echo chamber. While we don't have to agree with SonicFlyer, he has the right to post here.
Personally, I believe he's a pilot. Not an airline pilot, but a pilot nonetheless.
And I can understand him not wanting to post the aircraft he flies - it could be fairly easy to piece together who he is by that and details from previous posts. And I have no doubt that some here would try to track him down and dox him.