As much as I love pannier tank engines I never imagine in my wildest dreams I'd see a pannier with pistons. It's not something I am used to seeing. I suppose I had a similar reaction to 94XX Class No. 9466 at the West Somerset Railway with it's boiler front slightly protruding out from its body (kind of like a pannier and prairie hybrid). I am seeing all sorts of new train shapes every day. Great video by the way. :)