That looks really nice. You got a GREAT contour on that Belpaire firebox. It's not just a rectangular box! I like how you've captured the way the sides tip in a little as it comes up from the walkways.
I know people grouse about the wider-than-necessary driver spacing on those Con-Cor 2-10-2's. For me, the bigger issues are the spotty tender pickup and the way the drivers can get hung up in their bearings as they slide back and forth when the engine goes in and out of curves. If you gauge the drivers to the correct width (they come narrow from the factory), this problem becomes worse. But if you add some washers to limit the lateral movement to correct this, and fix the tender pickups, these things becomes really smooth, nice-running engines. I've got one in a box that is destined to become a GN 2-10-2 some day.