Philip, that looks to be a very solid, well made engine...I too like the idea of brass/bronze vs. iron castings for the rust avoidance along. I must also say your photos are really well done, crisp and nicely posed...even the grass one!
Bronze is certainly preferable to cast iron, i'm very happy with the engine Rog and i'm looking forward to running it on steam. I've heard they do take a bit of running in and run quite wet initially so we will see. Glad you like the photos, i wanted good closeups so you could see the quality of the castings and machining.