Also would like to see the C&O K2 or K3 Mikados. Make both the Vandy tender and the rectangular tender versions and I would buy one of each.
The C&O Pullman Standard passenger cars with the fluting only below the windows. These were ordered by the C&O and NKP but some also wound up on the D&RGW, D&H, B&O, ACL, SCL, NYC, and Amtrak.
Ken